LG 27GL63T-B completely dead

[Joe Black]

Hello everyone!

Have this fine monitor, which doesn´t give any sign of life.
No LED diode, no reaction whatsoever.
PSU is OK, and there is 19V on both big caps and one pin of backlight connector,
for example.

Now, in these modern things there is only one board and no discreet components at all, so I really can´t start much with it.
Any help would be appriciated

Board no. is EAX68524502(1.1) and there are none selling in Europe

[unclejoe01]

I have the same monitor, have you had any luck repairing it?

[kylegp]

Same here. Seems to be a common fault for this monitor. I haven't worked out the cause.

[CapLeaker]

You got power going to the board, but nothing happens? Check the crystal. If the crystal isn’t working nothing else is either. Check the SPI flash and pull the data sheet. Check if you can update the firmware. Maybe this thing has a TTL port hook up to it and see what happens there. Look at the board and check the little buck converter(s) maybe one is shorted to GND.

These LGs are known for bad HDMI ports and playing dead with LED off. Maybe find a dump and flash it to the SPI. They look good, but that’s about it in my book.

[chronic519]

Same board, found a shorted cap beside the audio jack. Removed jack, short gone and 3.3 going to cap now. Found it to be the LED was shorted inside the jack. Still not getting LED light to power button. Going to continue search.

[jiroy]

Questions to be asked , did you follow CapLeaker instructions ?
Did you find a schematic ? ..
With no follow up , no high resolution image , no schematic , how can we be of any help ?
Anyway , the only help I can get is this service manual , as it's similar in identifying the culprit ..

[rodeo65]

Hi I have here same screen with same issue - I hear buzzling noise close to jack. Will try to remove it and let you know more...

[rodeo65]

Originally Posted by chronic519

Same board, found a shorted cap beside the audio jack. Removed jack, short gone and 3.3 going to cap now. Found it to be the LED was shorted inside the jack. Still not getting LED light to power button. Going to continue search.

My IC401 is shorted - heating like a hell, many people had same issue - 'MP9148GJ-Z MP9148GJ IAKX SOT23-8
In a series of monitors LG uk. ( sot23-8 IAKXJ,) it produces 1.2V (for cpu) / and 3.3V
- conversion to two x NCP1529-D
- e.g. cpu RTD2536R > chassis LM78A monitor LG 27MP59G-P (pcb: EAX67270701)
- LG 27GL63t > cpu MST9U35Q1 > chassis LM81A (EAX68524502 (1.1)) '