Why won't my laptop screen display?

July 11, 2018 at 10:25:44
Specs: Windows 10, AMD Athlon 64 X2 6000+
Got an HP Pavillion G series laptop that was working fine one day then the next the screen just went to h*ll. Couldn't get a display no matter what I did. There was some jibberish on it like colored streaks but nothing that made any sense. So I did some research and it was suggested that it was a common problem for this laptop, that the video cable would become damaged over time since it was routed through the hinge. So I changed the video cable and it made no difference. So anyway I had the computer sitting on my table powered up and I just left it there and a while later I looked over at it and the screen was perfect, just like a new computer. So it was like that the rest of the day. At the end of the day I closed the lid and put it to sleep. The next day I proceeded to power it up and the screen was back to what it was, unviewable, just crap. And it has since gotten worse like just a black screen. I hooked the laptop up to my external monitor and the display is good...like it shold be, so the actual comuter works. I just need some help in determining what the problem is. Any help would be greatly appreciated. Thanks, Larry L

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#1
July 11, 2018 at 11:10:42
Try connecting an external monitor.

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#2
July 11, 2018 at 13:19:56
Remember that the display cable has two ends... Can you ensure that "both" connectors (one at each end of the ribbon cable) are securely inserted into their sockets at both ends...

Laptops obviously are very compact and motherboard connections can sometimes be less than essy to make securely; lkewise any within the lid assembly?


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#3
July 11, 2018 at 14:03:27
Everything you've said now points to a poor connection at one end or other of the cable as trvlr said. Unplug it and plug it in securely once more - both ends.

Always pop back and let us know the outcome - thanks


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#4
July 11, 2018 at 15:20:35
As I stated in my original message, I tried it on an external monitor and it worked

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#5
July 11, 2018 at 15:22:14
Did that repeatedly and it only stands to reason that the cable has two ends...actually it has three...but I put them on right and secured

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#6
July 11, 2018 at 15:22:53
Thank you for your input

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#7
July 11, 2018 at 15:50:33
Don’t know that model Acer personally, but is the display adapter hard wired (soldered) onto the motherboard?

Incidentally is the laptop running on battery only when no display, or is the problem present even with the mains adapter attached (and powered up obviously)?

Unusual, but not entirely unkown for the main/lid display o/p to fail, even if the external o/p is still OK.

Also not unknown for new ribbon cables (or other types too) to be defective even when “brand new”. Ribbon cables are by design vulnerable to failures more so than “round” cables.

When I’ve viewed reviews for assorted power cords for smart phones, I’ve noted that they appear to fail more easily than the round; some being intermittent (plug ends making poor connections within the sockets, or even poor internal connections - the actual conductors - within the plug ends themselves) on arrival.

I could see the same issues applying to laptop display ribbons...?


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#8
July 11, 2018 at 17:33:51
It sounds to me like a bad monitor. We have one monitor (all-in-one) that has that at start up but warms up and in a few minutes is fine. It has been that way for a year. If this gets better when it is left on then it is possible that it is either the video circuit or the monitor and a week component of either one. In the case of laptops and because the external monitor works, I would lean towards the monitor being the problem.

You have to be a little bit crazy to keep you from going insane.


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#9
July 11, 2018 at 19:24:05
trvlr,
the display adapter is soldered to the motherboard, the one end of the video cable attaches to it just by pushing it on and it snaps into place. I've made sure it is fully attached. And it is a ribbon cable with two other ends, one goes to the webcam and the other end goes to the screen. It's just so puzzling to me that it stopped working then did work but then stopped working again, without changing anything. I'm confused so that's why I'm seeking help here and I do appreciate all suggestions. And the problem exists with the power supply attached or not and even with the batter out of the comptuer....I've tried different things and those were some.

Larry L

message edited by Larry L


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#10
July 11, 2018 at 20:19:14
Maybe this.

Troubleshooting laptop with backlight failure
http://www.laptoprepair101.com/lapt...


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#11
July 12, 2018 at 08:12:34
Have you tried moving, wiggling, or carefully twisting the laptop lid to see if the display flickers? That would tell you if there's a short or break in the cable.

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