I have a 60PN6500 that turns on and shuts off after a few seconds with sound but no picture. I checked the power supply board and all voltages are all good. I checked the buffer boards with my DMM and they appear ok with no shorts. I also removed the Ysus & Zsus for visual inspection, Ysus visually looks good with no blown fuses, the EBR75486901 Zsus looks overheated in areas. The way this TV is wired you can not isolate each board separately from the power supply board because the power cable first goes to the Zsus then from the Zsus to the Ysus. So my question is has anyone experience this same problem and is there anyway to test the boards in circuit or what may have failed on the Zsus or Ysus board.
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Re: LG 60PN6500 turns on and shuts off after a few sconds
Do you get any screen glow? I would touch up all solder joints on power.z.and ysus.here is a repair kit for the smps.Attached Filesif you find these attachements useful please consider making a small donation to the site
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Re: LG 60PN6500 turns on and shuts off after a few sconds
Thanks for the reply, I dont think its a power supply problem because when I disconnect the output cable going to the Zsus board the TV stays on and all the voltage readings are perfect. I am leaning towards a problem with the Zsus board.
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Re: LG 60PN6500 turns on and shuts off after a few sconds
got a new zsus board and everything works good now. I could compare DMM readings from the good and bad board but Anyone know what fails on the EBR75486901 board ?Comment
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Hello everyone,
I need help with my Lenovo Legion laptop. It turns on for a few seconds and then immediately shuts down. I believe this is a BIOS corruption issue.
Laptop Model:- Model: Lenovo Legion Slim 5 16APH8
- GPU: NVIDIA GeForce RTX 4070
- Main BIOS chip size: 32MB
- VBIOS chip size: 16MB
What I Have Tried So Far:- I
11-04-2025, 05:14 AM -
MacBook Pro 14" M1 Pro Turns on functions then turns off when I plug in USB C cable to reset the computer. I disconnect the battery fully and then reconnect it and it won't turn back on. After letting it sit for a day I plug the battery back up, and the MagSafe 3 cable and it powers on and stays ons, once I plug in a USB C cable into the port closes to the MagSafe port it turns off and the Amber light turns off and won't turn on. No water damage, nothing, I want to do a DFU restore to wipe the computer since the customer stated they did an update and ever since it just decided to not work...
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Hello guys, i need your help fellow brothers
Im diagnosing a Lenovo G80-50 laptop
ACLU3/ACLU4
Rev : 1.0
when you press the power button, the LED power light turns On and quickly shuts down, no display, fan spins a sec and stop. I haven’t seen any short so far.
PU908 (CPU POWER CORE CHIP) is getting hot the moment you press the power button, the laptop turns off very fast, i changed PU908, still im getting same problem, on output side of the 2 cpu power supply coil i get 1.6v and then goes away as soon as the laptop turns off, still the... -
Seems like we are dealing with a case of a corrupted BIOS after Intel Driver software attempted to flash the bios (haven't seen that before). The customer reported seeing a BIOS message while the screen was flickering during the Intel Display Driver installation. This was while the BIOS WRITE lock jumper was in place. Resulting in Loop restarting.
Afterwards, the customer attempted flashing BIOS via USB stick, resulting now in turning and immediately shutting down unit NUC8I7HNK4.
Under the thermal cam, I can see that the CPU is initiating a heat signature for a second... -
I am testing an old LG L192WS-BN monitor I have that gives an image, but has a backlight issue. When you turn it on the backlight turns on 1 second and it turns off, turns on again, 1 second and it turns off and stays off. Using a flashlight I can see there's still an image.
I replaced a bulged cap on the main board, but made no difference. I also got another exact same model monitor that has a broken ccfl (the connector got ripped from the panel and the main screen connector is also broken so I can't use this panel to test), tried using the main board from this one, same issue....
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