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Feb 18th, 2005
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HP laptop display turning black

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Sitting on my computer last night and screen turned black. I had been poking around mcafee looking at firewall config but hadn't changed anything. Could BARELY make out display, but 90% sure the only thing displayed was my desktop. Could see task manager pop up when I hit ctrl alt del. Restarted computer and was fine. Happened again to my husband today. restarted computer screen was fine til it reached desktop after startup and then turned dark immediately.
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as1208 is offline Offline
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Mar 10th, 2005
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Re: HP laptop display turning black

Quote originally posted by as1208 ...
Sitting on my computer last night and screen turned black. I had been poking around mcafee looking at firewall config but hadn't changed anything. Could BARELY make out display, but 90% sure the only thing displayed was my desktop. Could see task manager pop up when I hit ctrl alt del. Restarted computer and was fine. Happened again to my husband today. restarted computer screen was fine til it reached desktop after startup and then turned dark immediately.
I found the problem and am posting my own reply in case this helps anyone else. It was in fact the backlight inverter. We tested it and it wasn't working. A very hard piece to find, and one that HP won't sell-their only offer was to replace the whole LCD unit for $600+. I took the inverter out to find the part number and the only place i found it was Bliss Computers at http://www.247laptoprepair.com/
We replaced the inverter and my screen is working fine for only $75!

Note: inverter won't always be the cause of the problem, but its cheaper to try fixing that first.
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Mar 10th, 2005
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Re: HP laptop display turning black

Quote originally posted by as1208 ...
Sitting on my computer last night and screen turned black.
Yeah, sitting on it will cause all kinds of problems! :lol:
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seatsd is offline Offline
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May 23rd, 2009
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Re: HP laptop display turning black

Yup i had the same problem, i thnk some pieces are defective,

mine's is a hp dv5 1040

luckily its still in waranty, it started blacking out,

it randomly blacks out,

so sending it to service centre, they'd hv to replace it, bt i gues i'd lose all my settings and files and stuff, pro's and cons of service center i guess
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slyangele is offline Offline
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May 23rd, 2009
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Re: HP laptop display turning black

reference to others hvng ths problem

http://forums.cnet.com/5208-7587_102...hreadID=281584
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slyangele is offline Offline
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May 23rd, 2009
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Re: HP laptop display turning black

Click to Expand / Collapse  Quote originally posted by slyangele ...
Yup i had the same problem, i thnk some pieces are defective,

mine's is a hp dv5 1040

luckily its still in waranty, it started blacking out,

it randomly blacks out,

so sending it to service centre, they'd hv to replace it, bt i gues i'd lose all my settings and files and stuff, pro's and cons of service center i guess
if they are only replacing lcd ,why should you loose any data on the harddrive
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caperjack is offline Offline
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Nov 2nd, 2009
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Re: HP laptop display turning black
in my laptop while connecting to projector,its showing no signal support.But its detecting the projector.still yesterday it was working fine.why its happening?
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jipin is offline Offline
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Nov 21st, 2009
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Designing LCD screens to fail

I just had an experience that makes me believe they are designing them to fail. The LCD screen on my HP Presario C700 became intermittent. I opened it all up and found that there was a small circuit board at the bottom of the screen that had exposed terminals right next to a grounding plate. If they touched, the screen lost backlight power. The only solution was to reboot. There was a small, soft buffer to keep these two parts separate, and it that got compressed, the short would happen. Now here's the weird thing. The grounding plate that creates the short is INTENTIONALLY there. It seems to have no other purpose than to be in close proximity to the charged circuit board. If you wanted to design something that would go out in a few years of use (but beyond the warranty policy), this would be a good way to design it!



Click to Expand / Collapse  Quote originally posted by as1208 ...
I found the problem and am posting my own reply in case this helps anyone else. It was in fact the backlight inverter. We tested it and it wasn't working. A very hard piece to find, and one that HP won't sell-their only offer was to replace the whole LCD unit for $600+. I took the inverter out to find the part number and the only place i found it was Bliss Computers at http://www.247laptoprepair.com/
We replaced the inverter and my screen is working fine for only $75!

Note: inverter won't always be the cause of the problem, but its cheaper to try fixing that first.
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KennyR is offline Offline
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Nov 21st, 2009
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Re: HP laptop display turning black
I just had an experience that makes me believe they are designing them to fail. The LCD screen on my HP Presario C700 became intermittent. I opened it all up and found that there was a small circuit board at the bottom of the screen that had exposed terminals right next to a grounding plate. If they touched, the screen lost backlight power. The only solution was to reboot. There was a small, soft buffer to keep these two parts separate, and it that got compressed, the short would happen. Now here's the weird thing. The grounding plate that creates the short is INTENTIONALLY there. It seems to have no other purpose than to be in close proximity to the charged circuit board. If you wanted to design something that would go out in a few years of use (but beyond the warranty policy), this would be a good way to design it!
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KennyR is offline Offline
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Aug 3rd, 2010
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Re: HP laptop display turning black
the top and bottom of my hp dv7 laptop is getting black it looks like a border bt it keeps gettin bigger everyday im afraid that one day when i turn on the laptop the screen will be black. please help
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