Laptop shuts down once mains power removed.

March 30, 2015 at 06:00:23
Specs: Windows 7, Intel Celeron 1037U Duel Core / 2gigs
I know this sounds like a battery issue, but i have fitted a 2nd battery & still have the same problem. If i try to start up the laptop without mains power connected, i can here the windows logo music but the screen is black. If i connect mains power & start up, it starts up fine. Another issue which i think is connected is that if i use the laptop say not on a fixed surface like a desk, say on my knee then i have problems with the screen going blank. I think this is due to the mains adaptor slightly moving & disconnecting power. If i move the laptop the screen will break up into thousands of coloured lines, sometimes it will stabilise but mostly it will go off. If i close the lid & put the pc into sleep mode then open again & press the start button it usually comes back on. This is very annoying as it happens very regularly. When placed on a hard surface this problem is much less profound. When connected the led indicator light seems to be charging ok. Usually red then turns blue over time to indicate the laptop is fully charged, but even if i disturb the adaptor even slightly the screen will go blank. As i said i dont think its the battery now as i have tried 2 different new ones with same result. Any ideas....

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#1
March 30, 2015 at 08:06:02
Were the batteries proper manufacturers replacements? Cheap equivalents can give trouble.

As for the intermittent fault it could be any sort of connection issue, maybe inside. If you find that it happens noticeably when you move the power connector around, it is either the plug, the adapter cable (near the plug) or the computer power socket itself. It is possible that the battery is not getting a proper charge if it keeps disconnecting.

Always pop back and let us know the outcome - thanks


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#2
March 30, 2015 at 10:26:14
Hi. Thanks for the help, the battery is straight replacement from the manufacturer. I`ve checked the lead connecting to the screen inside the laptop body only not inside the screen as it is very slimline i worried about damaging it trying to get in to it. I feel the flickering screen is more related to the power issue than a lose connection. If i leave the laptop several days without using it, when i connect the power lead, the red led is on to show it is charging, after 10-20 minutes or so the led has turned blue to signified full charge. Even so the slightest move of the laptop and the screen will go off. I have just discovered even when the laptop is sitting on a desk if i move the laptop lid a couple of cm the picture will go off, sometimes it will come back on when i move the lid again, so this points to lose cable i would think, maybe the issue is in the connector inside the lid

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#3
March 30, 2015 at 11:28:08
Two things, I believe, are likely. Number One is that the cable between the computer and the monitor is giving trouble where it hinges - a common fault. The other, less likely, possibility is that one of the connections (at either at the monitor end or the screen end) has worked lose. There might be some other issue(s) kicking around but my suggestion would be to renew the ribbon cable, unless removing and reconnection the cable at each end resolves the problem

Always pop back and let us know the outcome - thanks


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Related Solutions

#4
April 1, 2015 at 09:08:32
Hi Many thanks for your help. Ive checked the ribbon end inside the main body and that appears to be fine. The PC has a very thin lid similar to a macbook so i can only see one way to get inside which is to prise the rubber around the lid. I have the laptop next to me now on the desk mains power is on, blue led to show it is charged the screen is working fine. If i touch the mains power lead I lose the picture on the screen but the pc does not shut down as i have music playing on it now but with no picture. If i close the lid it will go into sleep mode when i open again and press start button the picture returns. This is without moving the lid. Also if while everything is ok i move the lid an inch the same will happen i lose the picture although sound is still good?

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#5
April 1, 2015 at 09:12:22
The laptop once started up with mains power, is ok when i remove the mains power i lose picture but sound remains ok, it will play for several hours like this until the battery runs down

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#6
April 1, 2015 at 10:43:12
Sometimes when you move something it is actually moving something else, often nearby. Various very small movements in different places might give a clue. The fact that you get sound and no picture at different times doesn't fit with a power plug/socket issue. I'm back to the ribbon cable idea.

What is the make and model number of this computer?

Always pop back and let us know the outcome - thanks


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#7
April 1, 2015 at 10:52:09
It seems to me that the battery alone does not have enough power to maintain the screen on. The last battery was the same issue. Even without touching the screen lid if I remove the power cord the picture is lost so that does not effect the ribbon.

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#8
April 1, 2015 at 13:43:52
Using your scenario, unless you keep getting dud batteries then it seems to only leave the possibility of the adapter not being able to keep the battery fully charged. Hard though to really imagine that it would still work the computer.

When you remove the adapter from the power point on the wall does this also make the screen blank out?

I assume this fault just suddenly came along out of the blue.

As said, let's have the make and model number to see if that gets us anywhere.

Always pop back and let us know the outcome - thanks


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