LG 27GL63T-B completely dead

[didinos]

régulateur changer + cpu😏

[Pandor]

I finally had some time to have a look at replacing the CPU. And it worked.
So for me, the fix was replacing IC401 with MP2122AGJ + CPU.
So i can finally vouch for the aliexpress link i posted. The CPU is good.

[Pickanick64]

Hi all!
Im here for the same problem, 27gl650 dead...
I think my problem is IC401, it gets extremely hot in less than a second.
Reading here, the MP2122GJ can be better than the original and perfect for a replacement.
However, I would also like to order some spare ICs for IC402 and IC400 but i can't find what they are.
I have IAGCN for the 402 and IAQTP for the 400.
Can someone help me identifying those?

Thanks!


PS. I have a lot of cap shorted to gnd around the 401, like C438 C439 C444 C403 C401... i will desolder the ic and test again later in the day

[Pickanick64]

Removed IC401, all shorts on caps disappeared!

Ordered new components for IC401 and 402 (not shure if is working or not).

For the C508 shorted near the audio jack: if you plug a jack, the short will go away. i think is intended to work this way.

[Pickanick64]

Great news, found some MP9148 (the original IC401) lying around and tried to replace it: MONITOR WORKING!
I take some measurement for the IC401, 402 and 400 if someone need them, from pin1 to pin8:

400: 300mV 19V 3,3V 0V 8V 2,4V 5V 790mV

401: 609mV 3,3V 1,1V 3,3V 0V 1,8V 5V 609mV

402: 286mV 19V 12,8V 0V 15V 3,3V 4,8V 800mV

[Christoph Mayer]

My CPU, the big processor on the Board is getting very very hot until seconds.
I cant find where to buy the PCB.
I have an LG 27GL63T-B
but my board is from LG 27GL650.
My case only has ONE hdmi port.



where can i buy an PCB compatible with mine?
I can also buy an PCB with 2 HDMIs instead of 1.
I think if its working i can modify the case if needed.
The seller from non business has already opened the TFT i think.
The TFT is from 2019. On the Board is written 2022 and some screws are missing and so on.

[Dency]

Hey guys. I got a dead LG 27GL650F-B monitor (no power). So i readed this thread and checked the IC401 voltages. On the pin3 missing 1,2V and pin6 missing 1,8V. In my country only availabe the MP2122AGJ component. Succesfully changed the IC401 and the monitor started working. WOW! Thank you guys for the information. Great community.

[Andrés Beyer]

just in case you guys still need this... i have my monitor with no power same as many here but my electronics knowledge is really bad...