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

I did actually get mine going..

Turned out to be what someone else posted in another thread:

[url]https://www.badcaps.net/forum/showthread.php?t=14594&page=3[/url]

From user t256:

"Replace SMD fuse F1 (2A) on the PCB LCM".

I checked the fuse after I finally found it and sure enough, it was dead. Managed to find some replacements on ebay and fixed it!

However....

Now I'm having an issue whereby if I scan for hardware...

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

Well, I've replaced D301 and this is now giving the correct readings.

Turned the monitor on and still the same as before (green power light, backlight on).

I tested ZD101 and R102 which were giving odd readings - lifted them and they then gave the correct reading.

I'm pretty much stuck now!

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

The plot thickens...

I've checked and I'm getting 0.173v from D301 and not the 0.4v-0.7v I see being mentioned in the forums.

I removed it from the board and found it to be a 1N5819. After searching I found it at Maplin:

[url]http://www.maplin.co.uk/p/1n5819-1a-schottky-barrier-rectifier-an07h[/url]

I have now got the part (bought 2 just in case), and ran a test - now I get 0.223v on both of them.

I noticed it is listed as a Schottky, and after coming across...

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

Hi all,

I'm in exactly the same boat as the OP - got a broken device from work with exact same symptoms.

I have dismantled it, and plan to test the components with a multimeter tonight (no visible signs of damage).

I was looking for availability on the Diodes mentioned here in case I need them. It seems I cannot find a UF1005, however a few places have UF1005-T's listed.Is that a viable alternative?

I am a beginner and never performed troubleshooting at the circuitry level...