Re: HP ZR2740w almost dead

You can try desolder LEDs with heat gun if you posses one, temperature like 400°C or so, carefully, not to burn pcb, try it first on some piece of solder somewhere else, then apply same procedure to the LED stripe... You are aiming for something like 20 - 40 seconds of applying heat until solder melts, thats relatively safe technique. For soldering new LEDs, common soldering station, flux and skilful hand is all you need...

You can try find similar diodes on farnell.com, even from your country:-)

Good luck with further repai...

Re: HP ZR2740w almost dead

Hi, you are lucky, i checked spam in my mail, which i dont do often, and there was notification on this forum, which i didnt visit since succesfull repair:-) Acording to disassembly, i did it year and half ago and dont remember much. Since then, monitor works like a charm... I dont know, what are your technical skills, with mine, that was definitely doable, not even hard i would say (time consuming ofcourse), but im hardware/firmware developer of medicine devices, so...

Are you using this manual?



As your are...

Re: HP ZR2740w almost dead

As i said Teeva, i test it in dissasembled state shown on picture bellow, so there was no possibillity of short circuit in my case. But finaly figured it out and repair LCD succesfully. Problem was badly soldered conector in LED string, which caused its fall. It actually pretty well correspond with voltages i measured on v01 - v06. So if it be helpfull for someone, problem can also be there. Actually, connector had to be pretty badly soldered considering monitor has never been opened before.

[ATTACH]105250[/ATTACH]

[ATTACH]105251[/ATTACH]...

Re: HP ZR2740w almost dead

Hi. Are there any results out of this? I have ZR2740w with same behavior, it flash for a short time after power on and then goes black. Weird think is that i try to run in dissasembled to see, if there isn´t problem with short circuit between PSU and metal cover describbed by Teeva and it actually worked, but only once. after that, i unplugged cables, pluged again, and doesn´t work any more, only flash after power on again. I also try to measure voltages v01 - v06 after power on with these results:

v01 after flash 30V and goes down...