brightness all the way up but screen dim

Question

Acer Chromebook

Repair guides and support for the Acer line of Chromebooks.

crwdns2934591:020crwdne2934591:0 crwdns2934593:0crwdne2934593:0 | crwdns2947278:043crwdne2947278:0 crwdns2947270:0crwdne2947270:0

All dent @haajwiia

crwdns2934065:0crwdne2934065:0: 13

2

crwdns2931729:0crwdne2931729:0: Sun 8, 2023

crwdns2933897:0crwdne2933897:0

brightness all the way up but screen dim

I have chromebook acer 2021 and I flashed my phone flashlight in it and then I could see it but other then that brightness is all the way up but screen so very very dim.

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2853045:0crwdne2853045:0 crwdns2853046:0crwdne2853046:0

crwdns2889612:0crwdne2889612:0 1

crwdns2944067:03crwdne2944067:0

@haajwiia that is a backlight error. Could be your panel or could be your Chromebook. What exact model is your Chromebook. You say it's a 2021 but we need to know the model number.

crwdns2934271:0Sun 8, 2023crwdnd2934271:0 oldturkey03 crwdne2934271:0

I am not sure

crwdns2934271:0Sun 8, 2023crwdnd2934271:0 All dent crwdne2934271:0

@haajwiia

There is usually a product information label on the bottom of the laptop. The model number should be shown there.

crwdns2934271:0Sun 8, 2023crwdnd2934271:0 jayeff crwdne2934271:0

crwdns2934285:0crwdne2934285:0

crwdns2933313:01crwdne2933313:0

@haajwiia that is a backlight error. Could be your panel or could be your Chromebook. What exact model is your Chromebook. You say it's a 2021 but we need to know the model number. — oldturkey03
@haajwiia

There is usually a product information label on the bottom of the laptop. The model number should be shown there. — jayeff

Derek Thomas @derekthoma78750 crwdns2934065:0crwdne2934065:0: 772 12 2 3 · Answer 1 · 2023-01-09T06:24:24-07:00

Hi All Dent,

Backlight Cable/Connector: I have had this same problem happen to me on an older MacBook and the issue was found in the cable that controlled the backlight. If the cable is broken, not plugged in, or just not plugged in the whole way, it can cause this problem. It can be an easy cable to miss when you put a laptop back together.
Backlight: If the cable has no flaw to it, it could be that the backlight itself is dead. This would be replacing either the whole LCD panel or the whole display assembly if necessary.
Ambient Light Sensor: If your Chromebook happens to have an ambient light sensor on it, the problem could reside there. If something is blocking this sensor, it could be making the display dim and not get to its full brightness. These sensors can usually be manually overridden by changing the brightness on your computer but I don't know exactly because it could be different for your computer.
Other: If none of these fix your issue, the problem could be damage to the logic board or any components on it.

Thanks, Derek Thomas

Acer Chromebook

brightness all the way up but screen dim

crwdns2933313:01crwdne2933313:0

crwdns2934229:0crwdne2934229:0