I have a philipsPFL427442D/37 When you turn it on all 3 green lights light up in the back on main board. Power light is on ,no red light a faint light comes on screen then goes black. If I turn it on and off sometimes a function strip comes on the top of the screen for a second, then black ? I checked the boards for any damage looks clean.? Where do I start testing ?
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Re: philips black screen
OK, since we do not have the TV in front of us to look at, we need good clear pictures of the back side of the TV to see how all the boards are connected, then good closed up of the board so we can see the component on the board and the labels on the connectors so we can see what the pins for the connectors are for.
See post 5 about how the pictures should be.
https://www.badcaps.net/forum/showth...312#post299312Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809
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Hello,
YouTube video of the problem encountered: https://youtube.com/shorts/q7TLNv36LUo
I am a pro and I have a problem that I have never seen despite my 7.5 years of experience on my own and my thousands of repairs, on a customer's Dell G3 15 3500.
On this PC I have already changed the complete palmrest because the keyboard was no longer working properly.
I also changed the screen because the PC fell and the screen was broken.
I changed the battery with a new and original battery.
I also had corrosion/oxidation on the... -
Hello everyone !
My name is Chris, I am a 30 years old embedded software developer working in the automotive industry. I am really passionate about learning new skills and repairing/crafting stuff. I came around this forum last week with the goal of repairing my faulty gaming laptop, indeed, I was video editing on it when suddenly a black screen popped and never disappeared
I bought some stuff to try to repair it and learn as many things as possible about computer repairs but nothing worked so far. When the black screen appeared, my legion 5 pro was connected to my external monitor...
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Hi guys
strange one
I have a dead Sony 55X850D
when plug in, black screen, no front white or red LED, no back light no screen
Voltages I get
3.3v LD/power and main board
reg 12V
reg 19V
3.3v on power on pin
no Tcon on
no tcon 12v
no BL_on
I do get BL_ERR 2.0v
I tried to bypass it by ground it but still get same symptom
I did also found a possible shorted cap on main board as it is showing 10 ohms when measure with meter
or is possible the chip next to... -
Hi everyone,
I have this strange behaviour with Acer Aspire E5-574-52RH, i5 6200U, intel graphics, DA0ZRWMB6G0 Rev G, model ZRW.
Laptop came in for a SSD upgrade, took everything apart to install the SSD.
Everything started after modifying BIOS settings to boot UEFI instead of Legacy.
Laptop works fine, i installed windows 10 and drivers/updates, everything works ok(when it works)
The black screen problem is random, maybe 5 out 10 times, laptop remains with the black screen, no image
Symptoms are:
- random black screen after displaying Acer logo... -
Have had two Acer K272HUL monitors die with the same symptoms:
- Blue power light is illuminated while the monitor is plugged in
- Black screen (no splash screen, etc.)
- Power button doesn't do anything
Opened it up and checked for bad caps and components, evidence of burns, etc. - everything looks fine.
Power supply voltages are fine.
There are some signal lines on the power supply harness that goes from the power supply to the logic board, not sure what these should be at.
Anyone have any ideas?...12-09-2023, 10:22 PM
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