I got this off ebay very cheap as no power, well turns out it does have power and even shows a display, but it's very random and will only work for at most about 30 seconds before it becomes fully dead/no power again, just to be certain I've unplugged the LED backlight and display cables but that has had no effect on functionality, it runs on roughly 14v, at idle draws 0.02W and will go up to 6W or more when functioning correctly.
Thus far as a matter of course I've replaced the main power rail capacitor and inductor (slightly higher value) and I double-checked the power mosfet for any shorts as well as gently pressed/shaken the board trying to find mechanical failures (cracked solider joints), I didn't notice any changes in behavior, so my best guess at this point is that a small cap or something has gone out of spec and is causing an issue with an enable signal or clock somewhere on the main board.
Can anyone please give me advice on what I should test next? I'm not very experienced in troubleshooting in general and know even less about TVs/monitors, note there is nothing (that I can see) on the underside of the board, everything appears to be on top and thank goodness for that since it appears to be held on by soldered clips.
Thus far as a matter of course I've replaced the main power rail capacitor and inductor (slightly higher value) and I double-checked the power mosfet for any shorts as well as gently pressed/shaken the board trying to find mechanical failures (cracked solider joints), I didn't notice any changes in behavior, so my best guess at this point is that a small cap or something has gone out of spec and is causing an issue with an enable signal or clock somewhere on the main board.
Can anyone please give me advice on what I should test next? I'm not very experienced in troubleshooting in general and know even less about TVs/monitors, note there is nothing (that I can see) on the underside of the board, everything appears to be on top and thank goodness for that since it appears to be held on by soldered clips.
Comment