It was always very slow but one day suddenly it won't power on: the power indicator as the power button was blinking blue.
I have tried to:
1. change power outlet: as before
2. power on without battery: no sign
3. check the power adapter: 19V, ok
4. press the power button for 60s without battery and power adapter, wait a few minutes, power on with battery and power adapter: as before
5. power on without RAM: as before
6. disassembly the notebook and check the CMOS battery: 2.95V, ok[br]
-
7. replace the battery: It powers on! But doesn’t charge (and it discharge itself, powered off during the night… is there a short circuit that drains current?)
8. check another time the power adapter: [https://postimg.cc/ns92bhzs|-19V] (with the minus! WT*!)
9. replace the power adapter: nothing…
Can the inverted polarity of the charger (is it possible?) destroys my charging circuits? They seem integrated in the motherboard. How I can repair the laptop?
Thank you in advance!
-
-
'''++Updates++'''
# check for continuity in DC-in cable: ok
+
@jayeff The old power adapter is not original, it is [https://www.subito.it/informatica/alimentatore-universale-ac-kraun-padova-327076716.htm|Kraun “Universal Notebook Power Adapter 90W Home Plus“] and yes, it has the polarity symbol with center positive. [br]
+
The new one is DTK DL90W shows 19V.
OMG I found why power adapter has reverse voltage! The generic connector was mounted in the [https://i.postimg.cc/T1wt1rcn/photo-2020-02-15-15-11-24-jpg.png|wrong way]!
The motherboard is Q5WT6 LA-8531P rev 2.0 but I can find [http://kythuatphancung.vn/uploads/download/35123_Compal_LA-8531P_2011-12-16_V0.3.pdf|schematics] only for rev 0.3.[br]
+
It is a little complex for me, I know the simplest reverse current protection circuits is a single diode but no more. (Transistors scare me ;D )
It was always very slow but one day suddenly it won't power on: the power indicator as the power button was blinking blue.
I have tried to:
1. change power outlet: as before
2. power on without battery: no sign
3. check the power adapter: 19V, ok
4. press the power button for 60s without battery and power adapter, wait a few minutes, power on with battery and power adapter: as before
5. power on without RAM: as before
6. disassembly the notebook and check the CMOS battery: 2.95V, ok[br]
7. replace the battery: It powers on! But doesn’t charge (and it discharge itself, powered off during the night… is there a short circuit that drains current?)
-
8. check another time the power adapter: -19V (with the minus! WT*!)
+
8. check another time the power adapter: [https://postimg.cc/ns92bhzs|-19V] (with the minus! WT*!)
9. replace the power adapter: nothing…
Can the inverted polarity of the charger (is it possible?) destroys my charging circuits? They seem integrated in the motherboard. How I can repair the laptop?
Thank you in advance!
+
+
+
+
'''++Updates++'''
+
+
# check for continuity in DC-in cable: ok
+
@jayeff The old power adapter is not original, it is [https://www.subito.it/informatica/alimentatore-universale-ac-kraun-padova-327076716.htm|Kraun “Universal Notebook Power Adapter 90W Home Plus“] and yes, it has the polarity symbol with center positive. [br]
+
The new one is DTK DL90W shows 19V.
+
+
OMG I found why power adapter has reverse voltage! The generic connector was mounted in the [https://i.postimg.cc/T1wt1rcn/photo-2020-02-15-15-11-24-jpg.png|wrong way]!
+
+
The motherboard is Q5WT6 LA-8531P rev 2.0 but I can find [http://kythuatphancung.vn/uploads/download/35123_Compal_LA-8531P_2011-12-16_V0.3.pdf|schematics] only for rev 0.3.[br]
+
It is a little complex for me, I know the simplest reverse current protection circuits is a single diode but no more. (Transistors scare me ;D )
It was always very slow but one day suddenly it won't power on: the power indicator as the power button was blinking blue.
I have tried to:
1. change power outlet: as before
2. power on without battery: no sign
3. check the power adapter: 19V, ok
4. press the power button for 60s without battery and power adapter, wait a few minutes, power on with battery and power adapter: as before
5. power on without RAM: as before
6. disassembly the notebook and check the CMOS battery: 2.95V, ok[br]
+
7. replace the battery: It powers on! But doesn’t charge (and it discharge itself, powered off during the night… is there a short circuit that drains current?)
8. check another time the power adapter: -19V (with the minus! WT*!)
9. replace the power adapter: nothing…
-
Can the inverted polarity of the charger (is it possible?) destroy my charging circuits? They seem integrated in the motherboard. How I can repair the laptop?
+
Can the inverted polarity of the charger (is it possible?) destroys my charging circuits? They seem integrated in the motherboard. How I can repair the laptop?
Hi!
I have an Acer Aspire E1-521.
It was always very slow but one day suddenly it won't power on: the power indicator as the power button was blinking blue.
I have tried to:
1. change power outlet: as before
2. power on without battery: no sign
3. check the power adapter: 19V, ok
4. press the power button for 60s without battery and power adapter, wait a few minutes, power on with battery and power adapter: as before
5. power on without RAM: as before
6. disassembly the notebook and check the CMOS battery: 2.95V, ok[br]
7. replace the battery: It powers on! But doesn’t charge (and it discharge itself, powered off during the night… is there a short circuit that drains current?)
8. check another time the power adapter: -19V (with the minus! WT*!)
9. replace the power adapter: nothing…
Can the inverted polarity of the charger (is it possible?) destroy my charging circuits? They seem integrated in the motherboard. How I can repair the laptop?
Thank you in advance!