Re: Hisense F42K20E HDMI inputs not detected



Doesn't get too warm. Actually might not be heating up at all and just getting residual heat from the trace connections. Don't have a spare board to pull one from, unfortunately. If the chip was in phones or computers I'd have some, but nope. Anyone else happen to have one?



Thank you very much. That will at least let me know which pins should have some sort of voltage and anything from 3v to 5v should be enough to trigger an IC. At least I can somewhat test it by tracking power in and out,...

Re: Hisense F42K20E HDMI inputs not detected



Any chance you know the voltages on the pins to check for? Then at least I'd know whether it's the IC or something before it. I was looking for that IC in the US and can't find it from anywhere but China, can't wait that long on the part....

Re: Hisense F42K20E HDMI inputs not detected

Found another image for it on SJ that's a little cleaner than mine. Again, I have voltage measurements on my uploads, which are of the exact board in question. Could it be the HDMI switch chip that all 3 HDMI ports are ran to? Is there any way to test it besides just replacing it, can't find what the voltages on the pins should be to test it? PS331 is the number on that chip....

Hisense F42K20E, no signal message from all HDMI inputs, been pulling my hair out over this one. I checked over the power supply board because I was originally told it wouldn't power on and stay on, no problems found though a couple of voltages seemed like they could be a hair out of range (18v measured 19v, LED voltage was 260v which seemed a little high to me). The brightness setting doesn't seem to change the LED level, and the large cap on that circuit gets pretty warm. Anyway, HDMI inputs display no signal found, can't seem to track down a problem with the main/input board. No caps look bad...

Re: New Members - please post your introductions here

New guy needing help with a TV here. Blasted thing has me pulling my hair out. Main board no HDMI signal detected. Will be posting the in the TV and video sources section shortly. Been reading this forum for years now but never had a problem I needed to ask questions about, lol.