Thank’s for asking, and have great expectation from me. Unfortunately, I’m the only user of 2 Hp Z1 and I had a problem the screen suddenly become darker on one side. After I buy a new one a few years ago on eBay and replaced it, after 2-3 years the same thing happens. I did not throw away the old one and decide to make one working from two that I had. We changed the good one to be in one panel and we have seen that on Bad some wires are disconnected. My friend takes them to Mobilephone repair shop and they properly solder them. Last year I both another HP Z1 for pennies since the screen did not work! And I have replaced the panel with a fixed one, and Miracles appear. The screen is working perfectly and it still works. In the meantime, I have found on Aliexpress that I can buy new LED stripes and don’t need to solder them.
My suggestion is to clean all connections on your screen. Try first with a vacuum cleaner, Use also gentile brush like one from your girlfriend for makeup or compresed air but not strong blow. This will remove dust that maybe is the reason for your problem. In most cases, people don’t clean PC ever. If this doesn’t help use Contact spray and watch that is not draining all ower screen. Use paper tissue on the opposite side to pick up liquid. Live overnight to evaporate and then plug the screen to the power and turn it on. Be sure that you do this when the screen is UNPlague from power and PC. Always live for few hours to discharge and then do the cleaning procedure. If this not help then something else is the problem and you might need to change the display. Hope this will help, and do this when you decide that your screen has “no pulse” and you consider that need reanimation.
Hope this will help!
I have an HP Z1 with the LG 27" display. It exhibits the exact same "backlight shadow" as shown above.
I've replaced LED backlights in a 50" TV, so I have an idea of what's involved.
My question is, on this panel, are there rows of left and right LED strips behind the panel, or are they just along the top and bottom (edge lit)? Thank you kindly in advance.
- de Duncan McAllister
@Duncan McAllister should be an edge lit monitor but it will depend on what panel they popped in there. Once you remove the back cover check the label and try a search for the datasheet
- de oldturkey03
Thank you kindly for your timely response. It's one of the LG LM270WQ variants.
I got the thing apart and there are two LED strips along the bottom edge of the panel. The left strip is shorted -- all the individual LEDs test OK with a meter.
But on startup, the strip just flashes for a second, and then the PSU shuts it off. I removed and resoldered the connector with a hot air station, but no dice. I've ordered a new pair of strips.
I'm going to try to photograph the various steps when I reassemble the panel. I think it would be useful to have a step-by-step teardown of the actual panel itself, with all the different layers. That's one thing I couldn't find anywhere online.
- de Duncan McAllister
Hi To All that experienced same problem. I have two Z1 and on both, I had the same problem. First time I have to buy a new panel from eBay and the same thing happen after 2 years. The problem is in Poor cooling of the system. LED stripes are at the bottom but they create a loot of temperature and in fime connector that is on LED stripes lose connection and need to be soldered with new material. My friend that has a microscope, soldered them and we now have everything working. So dare is no need to change all panel, just carefully disassembly panel. Anyway you can do anything wrong since your panel is already half useful. For dose that is not careful and skillful for this operation, I suggest not to do it. Be careful to mark all layers and make photos witch goes where and when. Led stripes can be ordered from Aliexpres if you don't want to solder your old one. Hope this will help you. BR
- de Sasa Raca