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 Files -
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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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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... -
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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... -
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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.... -
Hi all, I am working on Hp 15-ca2003ca (MB DAG7BDMB8F0 REV:F). The problem was totally dead. Upon diagnostics, there was a burnt SY8286BRAC. I replaced it with another one. Now the WHITE LED on the DC-in jack glows & when the main battery is installed, the status of the LED changes to Orange. But when I press ON/OFF button, I see the power LED glows for a sec & then shuts off. Same happens when I press the ON/OFF button over again. I just put the Meter leads on the 3.3/5V coils & the meter shows that these both volts are generated & then in a sec. goes away. I re-programmed the...
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