Re: HP LP3065 black screen, LED lighted, USB works

Put the whole thing together to power it up and was able to hear that the high pitched noise was coming from one of the two larger transformers/chokes on the high side. I hooked up my seek thermal camera to pin point anything which was getting hot and it showed the large diode at D101 as warming very quickly.

Funny that D101 was the only diode I didn't check because of its orientation. I tested it and it was definitely bad. Replaced with a temporary diode which was a bit under spec and the monitor turned on! I will...

Re: HP LP3065 black screen, LED lighted, USB works

My monitor gave it up today. I believe it is the power supply mostly because of the"noise." I still have some high pitched hearing left and I can hear a high pitched noise pulsing slowly (power supply trying to startup?). I haven't tested the 24V output yet, but plan to.

Replacement power supplies are $120 which is pretty steep for an old power supply.

Royster86,
I read a similar low value on D301 (0.160V). Unfortunately everything else including D307 testing OK. Were you ever able...