If it has only two connection points, in this instance more likely it is a fuse and not an IC. Does it look damaged or heat stressed?
+
If it has only two connection points, in this instance more likely it is a fuse and not an IC (chip). Does it look damaged or heat stressed?
Disconnect the battery from the motherboard (unplug it) and use an Ohmmeter to measure the component for continuity to see if it is OK or not i.e. 0.00 Ohms and not OL or infinite Ohms..
If you don't have a DMM (digital multimeter) post an image of the "chip" in your question. Here's how to do this on ifixit [guide|21499].
Another way to test if it is a backlight problem or something else is with the laptop turned on try shining a flashlight at an angle close to the laptop screen and check if you can detect any images on the screen at all.
They will be ''very faint'' if they are there to be seen so trying this in a darkened room may help.
''If you can see images'' then there's a backlight problem with the display.
Since you have changed LCD panel, check if the F1 fuse on the motherboard is OK and not blown - see above
This is the fuse that supplies power to the backlights in the display.
Below is an image taken from the [document|42179|schematics] showing the fuse and where it connects to pins 32-34 of the EDP cable connector on the motherboard.
There's always backlight power being supplied to the display when the laptop is turned on. It is a signal sent on the EC_DISPON lead (pin 22) that tells the display to either turn the backlights on or off. The power is not turned off on the motherboard
If the fuse is blown search online for a [link|https://www.google.com/search?client=firefox-b-d&q=0467002.NRHF%2F2A%2F32V_0603|0467002.NRHF/2A/32V_0603] fuse to find suppliers that suit you best. Purchase two or three just in case, as usually fuses don't fail for no reason so if the replacement also fails shortly afterwards the reason will have to be found.
''If you can't see any images, (or if the fuse blows again)'' the schematics will help to find out what's happening.
If it has only two connection points, in this instance more likely it is a fuse and not an IC. Does it look damaged or heat stressed?
Disconnect the battery from the motherboard (unplug it) and use an Ohmmeter to measure the component for continuity to see if it is OK or not i.e. 0.00 Ohms and not OL or infinite Ohms..
If you don't have a DMM (digital multimeter) post an image of the "chip" in your question. Here's how to do this on ifixit [guide|21499].
Another way to test if it is a backlight problem or something else is with the laptop turned on try shining a flashlight at an angle close to the laptop screen and check if you can detect any images on the screen at all.
They will be ''very faint'' if they are there to be seen so trying this in a darkened room may help.
''If you can see images'' then there's a backlight problem with the display.
-
Since you have changed LCD panel, check if the F1 fuse on the motherboard is OK and not blown.
+
Since you have changed LCD panel, check if the F1 fuse on the motherboard is OK and not blown - see above
This is the fuse that supplies power to the backlights in the display.
Below is an image taken from the [document|42179|schematics] showing the fuse and where it connects to pins 32-34 of the EDP cable connector on the motherboard.
There's always backlight power being supplied to the display when the laptop is turned on. It is a signal sent on the EC_DISPON lead (pin 22) that tells the display to either turn the backlights on or off. The power is not turned off on the motherboard
If the fuse is blown search online for a [link|https://www.google.com/search?client=firefox-b-d&q=0467002.NRHF%2F2A%2F32V_0603|0467002.NRHF/2A/32V_0603] fuse to find suppliers that suit you best. Purchase two or three just in case, as usually fuses don't fail for no reason so if the replacement also fails shortly afterwards the reason will have to be found.
''If you can't see any images, (or if the fuse blows again)'' the schematics will help to find out what's happening.
More likely it is a fuse and not an IC. Does it look damaged or heat stressed?
+
If it has only two connection points, in this instance more likely it is a fuse and not an IC. Does it look damaged or heat stressed?
-
Post an image of the "chip" in your question. Here's how to do this on ifixit https://www.ifixit.com/Guide/Adding+images+to+an+existing+question/21499.
+
Disconnect the battery from the motherboard (unplug it) and use an Ohmmeter to measure the component for continuity to see if it is OK or not i.e. 0.00 Ohms and not OL or infinite Ohms..
-
With the laptop turned on try shining a flashlight at an angle close to the laptop screen and check if you can detect any images on the screen at all.
+
If you don't have a DMM (digital multimeter) post an image of the "chip" in your question. Here's how to do this on ifixit [guide|21499].
+
+
Another way to test if it is a backlight problem or something else is with the laptop turned on try shining a flashlight at an angle close to the laptop screen and check if you can detect any images on the screen at all.
They will be ''very faint'' if they are there to be seen so trying this in a darkened room may help.
''If you can see images'' then there's a backlight problem with the display.
Since you have changed LCD panel, check if the F1 fuse on the motherboard is OK and not blown.
This is the fuse that supplies power to the backlights in the display.
Below is an image taken from the [document|42179|schematics] showing the fuse and where it connects to pins 32-34 of the EDP cable connector on the motherboard.
There's always backlight power being supplied to the display when the laptop is turned on. It is a signal sent on the EC_DISPON lead (pin 22) that tells the display to either turn the backlights on or off. The power is not turned off on the motherboard
If the fuse is blown search online for a [link|https://www.google.com/search?client=firefox-b-d&q=0467002.NRHF%2F2A%2F32V_0603|0467002.NRHF/2A/32V_0603] fuse to find suppliers that suit you best. Purchase two or three just in case, as usually fuses don't fail for no reason so if the replacement also fails shortly afterwards the reason will have to be found.
''If you can't see any images, (or if the fuse blows again)'' the schematics will help to find out what's happening.
More likely it is a fuse and not an IC. Does it look damaged or heat stressed?
+
+
Post an image of the "chip" in your question. Here's how to do this on ifixit https://www.ifixit.com/Guide/Adding+images+to+an+existing+question/21499.
With the laptop turned on try shining a flashlight at an angle close to the laptop screen and check if you can detect any images on the screen at all.
They will be ''very faint'' if they are there to be seen so trying this in a darkened room may help.
''If you can see images'' then there's a backlight problem with the display.
Since you have changed LCD panel, check if the F1 fuse on the motherboard is OK and not blown.
This is the fuse that supplies power to the backlights in the display.
Below is an image taken from the [document|42179|schematics] showing the fuse and where it connects to pins 32-34 of the EDP cable connector on the motherboard.
There's always backlight power being supplied to the display when the laptop is turned on. It is a signal sent on the EC_DISPON lead (pin 22) that tells the display to either turn the backlights on or off. The power is not turned off on the motherboard
If the fuse is blown search online for a [link|https://www.google.com/search?client=firefox-b-d&q=0467002.NRHF%2F2A%2F32V_0603|0467002.NRHF/2A/32V_0603] fuse to find suppliers that suit you best. Purchase two or three just in case, as usually fuses don't fail for no reason so if the replacement also fails shortly afterwards the reason will have to be found.
''If you can't see any images, (or if the fuse blows again)'' the schematics will help to find out what's happening.
With the laptop turned on try shining a flashlight at an angle close to the laptop screen and check if you can detect any images on the screen at all.
They will be ''very faint'' if they are there to be seen so trying this in a darkened room may help.
''If you can see images'' then there's a backlight problem with the display.
-
Since you have changed LCD panels, check if the F1 fuse on the motherboard is OK and not blown.
+
Since you have changed LCD panel, check if the F1 fuse on the motherboard is OK and not blown.
This is the fuse that supplies power to the backlights in the display.
Below is an image taken from the [document|42179|schematics] showing the fuse and where it connects to pins 32-34 of the EDP cable connector on the motherboard.
There's always backlight power being supplied to the display when the laptop is turned on. It is a signal sent on the EC_DISPON lead (pin 22) that tells the display to either turn the backlights on or off. The power is not turned off on the motherboard
If the fuse is blown search online for a [link|https://www.google.com/search?client=firefox-b-d&q=0467002.NRHF%2F2A%2F32V_0603|0467002.NRHF/2A/32V_0603] fuse to find suppliers that suit you best. Purchase two or three just in case, as usually fuses don't fail for no reason so if the replacement also fails shortly afterwards the reason will have to be found.
''If you can't see any images, (or if the fuse blows again)'' the schematics will help to find out what's happening.
With the laptop turned on try shining a flashlight at an angle close to the laptop screen and check if you can detect any images on the screen at all.
They will be ''very faint'' if they are there to be seen so trying this in a darkened room may help.
''If you can see images'' then there's a backlight problem with the display.
Since you have changed LCD panels, check if the F1 fuse on the motherboard is OK and not blown.
This is the fuse that supplies power to the backlights in the display.
Below is an image taken from the [document|42179|schematics] showing the fuse and where it connects to pins 32-34 of the EDP cable connector on the motherboard.
-
There's always backlight power being supplied to the display when the laptop is turned on. It is a signal sent on the EC_DISPON lead (pin 22) that tells the display to either turn the backlights on or off
+
There's always backlight power being supplied to the display when the laptop is turned on. It is a signal sent on the EC_DISPON lead (pin 22) that tells the display to either turn the backlights on or off. The power is not turned off on the motherboard
If the fuse is blown search online for a [link|https://www.google.com/search?client=firefox-b-d&q=0467002.NRHF%2F2A%2F32V_0603|0467002.NRHF/2A/32V_0603] fuse to find suppliers that suit you best. Purchase two or three just in case, as usually fuses don't fail for no reason so if the replacement also fails shortly afterwards the reason will have to be found.
''If you can't see any images, (or if the fuse blows again)'' the schematics will help to find out what's happening.
With the laptop turned on try shining a flashlight at an angle close to the laptop screen and check if you can detect any images on the screen at all.
They will be ''very faint'' if they are there to be seen so trying this in a darkened room may help.
''If you can see images'' then there's a backlight problem with the display.
Since you have changed LCD panels, check if the F1 fuse on the motherboard is OK and not blown.
This is the fuse that supplies power to the backlights in the display.
Below is an image taken from the [document|42179|schematics] showing the fuse and where it connects to pins 32-34 of the EDP cable connector on the motherboard.
+
There's always backlight power being supplied to the display when the laptop is turned on. It is a signal sent on the EC_DISPON lead (pin 22) that tells the display to either turn the backlights on or off
+
If the fuse is blown search online for a [link|https://www.google.com/search?client=firefox-b-d&q=0467002.NRHF%2F2A%2F32V_0603|0467002.NRHF/2A/32V_0603] fuse to find suppliers that suit you best. Purchase two or three just in case, as usually fuses don't fail for no reason so if the replacement also fails shortly afterwards the reason will have to be found.
''If you can't see any images, (or if the fuse blows again)'' the schematics will help to find out what's happening.
With the laptop turned on try shining a flashlight at an angle close to the laptop screen and check if you can detect any images on the screen at all.
They will be ''very faint'' if they are there to be seen so trying this in a darkened room may help.
''If you can see images'' then there's a backlight problem with the display.
Since you have changed LCD panels, check if the F1 fuse on the motherboard is OK and not blown.
This is the fuse that supplies power to the backlights in the display.
Below is an image taken from the [document|42179|schematics] showing the fuse and where it connects to pins 32-34 of the EDP cable connector on the motherboard.
If the fuse is blown search online for a [link|https://www.google.com/search?client=firefox-b-d&q=0467002.NRHF%2F2A%2F32V_0603|0467002.NRHF/2A/32V_0603] fuse to find suppliers that suit you best. Purchase two or three just in case, as usually fuses don't fail for no reason so if the replacement also fails shortly afterwards the reason will have to be found.
-
''If you can't see any images, (or if the fuse blows again)'' tt least the schematics will help to find out what's happening.
+
''If you can't see any images, (or if the fuse blows again)'' the schematics will help to find out what's happening.
With the laptop turned on try shining a flashlight at an angle close to the laptop screen and check if you can detect any images on the screen at all.
They will be ''very faint'' if they are there to be seen so trying this in a darkened room may help.
''If you can see images'' then there's a backlight problem with the display.
Since you have changed LCD panels, check if the F1 fuse on the motherboard is OK and not blown.
This is the fuse that supplies power to the backlights in the display.
Below is an image taken from the [document|42179|schematics] showing the fuse and where it connects to pins 32-34 of the EDP cable connector on the motherboard.
-
If the fuse is blown search online for a [link|https://www.google.com/search?client=firefox-b-d&q=0467002.NRHF%2F2A%2F32V_0603|0467002.NRHF/2A/32V_0603] fuse to find suppliers that suit you best. Purchase two or three just in case, as usually fuses don't fail for no reason so if the replacement also fails shortly afterwards the reason will have to be found. At least the schematics will help with this.
+
If the fuse is blown search online for a [link|https://www.google.com/search?client=firefox-b-d&q=0467002.NRHF%2F2A%2F32V_0603|0467002.NRHF/2A/32V_0603] fuse to find suppliers that suit you best. Purchase two or three just in case, as usually fuses don't fail for no reason so if the replacement also fails shortly afterwards the reason will have to be found.
-
''If you can't see any images, (or if the fuse blows again)'' did you check or replace the EDP cable?It may be that it is damaged where it passes through the hinge between the motherboard and the display assembly. Just a thought.
+
''If you can't see any images, (or if the fuse blows again)'' tt least the schematics will help to find out what's happening.
With the laptop turned on try using a strong light at an angler to the laptop screen and check if you can detect any images on the screen at all.
+
With the laptop turned on try shining a flashlight at an angle close to the laptop screen and check if you can detect any images on the screen at all.
They will be ''very faint'' if they are there to be seen so trying this in a darkened room may help.
''If you can see images'' then there's a backlight problem with the display.
Since you have changed LCD panels, check if the F1 fuse on the motherboard is OK and not blown.
This is the fuse that supplies power to the backlights in the display.
-
Below is an image taken from the [document|42179|schematics] showing the fuse and where it connects to pins 32-34 of the EDP canle connector on the motherboard.
+
Below is an image taken from the [document|42179|schematics] showing the fuse and where it connects to pins 32-34 of the EDP cable connector on the motherboard.
-
If the fuse is blown search online for a [https://www.google.com/search?client=firefox-b-d&q=0467002.NRHF%2F2A%2F32V_0603|0467002.NRHF/2A/32V_0603] fuse to find suppliers that suit you best. Purchase two or three just in case, as usually fuses don't fail for no reason so if the replacement also fails shortly afterwards the reason will have to be found. At least the schematics will help with this.
+
If the fuse is blown search online for a [link|https://www.google.com/search?client=firefox-b-d&q=0467002.NRHF%2F2A%2F32V_0603|0467002.NRHF/2A/32V_0603] fuse to find suppliers that suit you best. Purchase two or three just in case, as usually fuses don't fail for no reason so if the replacement also fails shortly afterwards the reason will have to be found. At least the schematics will help with this.
''If you can't see any images, (or if the fuse blows again)'' did you check or replace the EDP cable? It may be that it is damaged where it passes through the hinge between the motherboard and the display assembly. Just a thought.
Hi @downtoclown777,
With the laptop turned on try using a strong light at an angler to the laptop screen and check if you can detect any images on the screen at all.
They will be ''very faint'' if they are there to be seen so trying this in a darkened room may help.
''If you can see images'' then there's a backlight problem with the display.
Since you have changed LCD panels, check if the F1 fuse on the motherboard is OK and not blown.
This is the fuse that supplies power to the backlights in the display.
Below is an image taken from the [document|42179|schematics] showing the fuse and where it connects to pins 32-34 of the EDP canle connector on the motherboard.
If the fuse is blown search online for a [https://www.google.com/search?client=firefox-b-d&q=0467002.NRHF%2F2A%2F32V_0603|0467002.NRHF/2A/32V_0603] fuse to find suppliers that suit you best. Purchase two or three just in case, as usually fuses don't fail for no reason so if the replacement also fails shortly afterwards the reason will have to be found. At least the schematics will help with this.
''If you can't see any images, (or if the fuse blows again)'' did you check or replace the EDP cable? It may be that it is damaged where it passes through the hinge between the motherboard and the display assembly. Just a thought.
[image|3670118]
(click on image)