This was given to me the other day.... All I was told is the power light blinks. It's a 43" Samsung 4K from ~2018. Geez, this one didn't live long...
I plugged it in, and as they said, power/standby LED blinking....but not by the firmware/control. The blinking is caused by a PSU not starting up.... I can hear the PSU 'chirp' in unison with the blinking light. There's no voltages present except the pulsing/intermittent standby. I've checked all the usual suspects, can't seem to find anything bad (caps, diodes, etc). The PSU still does this with everything unplugged.....eliminates LED strips, LVDS, and the panel itself. I tested the LED strips with my tester, they lit up nice & pretty....so its down to this one & only board in the set. This board has already pissed me off.....it's lucky it hasn't been smashed with a hammer. Even after discharging the mains cap, it bit me twice....so it apparently doesn't have discharge circuitry!!
Whatever is wrong with this is apparently a common problem, these boards are nowhere to be found....but I never found any detailed information as to what the actual fault might be.....any of you experts have some input?
Here's the high res of the top & bottom views of the board:
https://www.badcaps.net/forum/attach...1&d=1619719005
https://www.badcaps.net/forum/attach...1&d=1619719005
I plugged it in, and as they said, power/standby LED blinking....but not by the firmware/control. The blinking is caused by a PSU not starting up.... I can hear the PSU 'chirp' in unison with the blinking light. There's no voltages present except the pulsing/intermittent standby. I've checked all the usual suspects, can't seem to find anything bad (caps, diodes, etc). The PSU still does this with everything unplugged.....eliminates LED strips, LVDS, and the panel itself. I tested the LED strips with my tester, they lit up nice & pretty....so its down to this one & only board in the set. This board has already pissed me off.....it's lucky it hasn't been smashed with a hammer. Even after discharging the mains cap, it bit me twice....so it apparently doesn't have discharge circuitry!!
Whatever is wrong with this is apparently a common problem, these boards are nowhere to be found....but I never found any detailed information as to what the actual fault might be.....any of you experts have some input?
Here's the high res of the top & bottom views of the board:
https://www.badcaps.net/forum/attach...1&d=1619719005
https://www.badcaps.net/forum/attach...1&d=1619719005
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