Re: HP ZR2740w screen goes black

Sorry to double post but I put it all back together and it worked fine for 20-30 minutes last night before I shut it down. :S

Edit: I also never mentioned this but the monitor was absolutely disgusting inside. There was a pile of roaches inside the back cover. I dumped all of them out and threw it in the sink and scrubbed it down. I also wiped down and cleaned the boards and the inside of the monitor with some wipes. I got it pretty clean and used Lysol for good measure where I could. Maybe cleaning out some of that filth helped

Re: HP ZR2740w screen goes black

So the issue is possibly a bad/intermittent connection beneath the main chip on the main board?

What about this process?
[url]http://www.instructables.com/id/BGA-rework/[/url]

That makes more sense than the power board having issues since I seem to have power just fine. It is odd that those same four resistors were out on mine as in the other thread though.Re: HP ZR2740w screen goes black<br ... board? <br />

So do you mean re-flowing the solder or re-attaching that chip? I have a heat gun but not a hot air gun if that's what it takes. I was given this monitor for free by a family member and am trying to give it some life back without investing too much into it.

I will try to take more pictures tonight and test the caps on the power board....

Re: HP ZR2740w screen goes black

No reading (infinite resistance). I even went around the board and tested others to make sure my multimeter was working and got normal readings on the others. All four in series (parallel?) were like this. Sorry, what do you mean BGA issue?

Re: HP ZR2740w screen goes black


My plan was to replace the four 500k resistors with two 1Mohm resistors. However I ordered 1W rated ones. Would that affect the resistance?


It works fine for a couple of minutes and then the picture stops moving and fades to black within about a second. It seems to work until it warms up because turning it off and on again won't change anything until you let it sit for a while. Also it looks like the backlight is still on when it goes out....

Hi, I recently got a monitor that goes to a black screen after about two minutes. The backlight will remain on though. After some googling, I think the problem is resistor R810. I tested mine after reading advice of others having the same issue and mine along with 3 others in a line were bad. I'm wondering though, should I try and replace these with the same value resistors or will they go out again? Is there maybe a higher value I could use to help prevent the new ones burning out?

I don't know anything about circuit design but I can solder okay. I attached images of the problem...

Re: New Members - please post your introductions here

Hi I'm from Alabama and recently received a nice monitor with a problem and am hoping to fix it with some info from this site