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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Dell laptop screen goes off on mains but fine on battery.
Hi,
Please I have a Dell Inspirer laptop from a friend with windows Vista home Edition. The laptop works alright on battery but when it is connected to the the mains the screen goes off. In fact the screen goes off after it has finished booting. it is the back light that goes off cos the desk top could be seen dimmely in the background. Also when the mains is removed, the machine has to be reseted b4 it will work normally. Please help Thanks |
#2
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Dell laptop screen goes off on mains but fine on battery.
wrote in message ... Hi, Please I have a Dell Inspirer laptop from a friend with windows Vista home Edition. The laptop works alright on battery but when it is connected to the the mains the screen goes off. In fact the screen goes off after it has finished booting. it is the back light that goes off cos the desk top could be seen dimmely in the background. Also when the mains is removed, the machine has to be reseted b4 it will work normally. Please help Thanks Check the easy stuff first, is it set to use an external monitor instead of the internal panel? |
#3
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Dell laptop screen goes off on mains but fine on battery.
check screensaver setttings for display during power/battery usage, make
some changes. sometimes the settings get screwed up. wrote in message ... Hi, Please I have a Dell Inspirer laptop from a friend with windows Vista home Edition. The laptop works alright on battery but when it is connected to the the mains the screen goes off. In fact the screen goes off after it has finished booting. it is the back light that goes off cos the desk top could be seen dimmely in the background. Also when the mains is removed, the machine has to be reseted b4 it will work normally. Please help Thanks |
#4
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Dell laptop screen goes off on mains but fine on battery.
Meat Plow wrote:
On Sun, 09 Dec 2007 07:34:31 +0000, James Sweet wrote: wrote in message ... Hi, Please I have a Dell Inspirer laptop from a friend with windows Vista home Edition. The laptop works alright on battery but when it is connected to the the mains the screen goes off. In fact the screen goes off after it has finished booting. it is the back light that goes off cos the desk top could be seen dimmely in the background. Also when the mains is removed, the machine has to be reseted b4 it will work normally. Please help Thanks Check the easy stuff first, is it set to use an external monitor instead of the internal panel? To my knowledge of laptops (I own 3) if JUST the backlight is switching off as the OP indicates, this is not a real function of a BIOS or O/S setting. It may perhaps be yet another a bug in Vista since there are so many. My feeling as well. I'd look for something physical having to do with the power plug. Perhaps it flexes a portion of the circuit board when it's plugged in. Easy to check, though. Simply unplug from the mains, but leave the DC plug in the back...maybe wiggle it. If it doesn't work, I'm wrong. That's not to say that the other posters are incorrect about BIOS, power saver etc.... jak |
#5
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Dell laptop screen goes off on mains but fine on battery.
On Dec 10, 4:29*am, jakdedert wrote:
Meat Plow wrote: On Sun, 09 Dec 2007 07:34:31 +0000, James Sweet wrote: wrote in message .... Hi, * * * *Please I have a Dell Inspirer laptop from a friend with windows Vista *home Edition. The laptop works alright on battery but when it is connected to the the mains the screen goes off. In fact the screen goes off after it has finished booting. it is the back light that goes off cos the desk top could be seen dimmely in the background. Also when the mains is removed, the machine has to be reseted b4 it will work normally. Please help Thanks Check the easy stuff first, is it set to use an external monitor instead of the internal panel? To my knowledge of laptops (I own 3) if JUST the backlight is switching off as the OP indicates, this is not a real function of a BIOS or O/S setting. It may perhaps be yet another a bug in Vista since there are so many. My feeling as well. *I'd look for something physical having to do with the power plug. *Perhaps it flexes a portion of the circuit board when it's plugged in. Easy to check, though. *Simply unplug from the mains, but leave the DC plug in the back...maybe wiggle it. *If it doesn't work, I'm wrong. That's not to say that the other posters are incorrect about BIOS, power saver etc.... jak- Hide quoted text - - Show quoted text - I have the same problem, although not quite as bad yet. I have found that if I wiggle my AC power cord where it plugs into the back of the laptop, I can replicate the problem. I am going to try it to see if I ge the same problem when it's not plugged into the mains. It's definately a hardware issue, at least my problem is. |
#6
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Dell laptop screen goes off on mains but fine on battery.
"Meat Plow" wrote in message
... On Sat, 22 Dec 2007 06:37:40 -0800, alan wrote: I have the same problem, although not quite as bad yet. I have found that if I wiggle my AC power cord where it plugs into the back of the laptop, I can replicate the problem. I am going to try it to see if I ge the same problem when it's not plugged into the mains. It's definately a hardware issue, at least my problem is. Is your plug a barrel connector or that 3 pin deal? I've owned two Dells in the past 9 years and both are now in the scrap bin. Good thing I held on to the supplies though as I've used one to replace a failed supply on one of my 3 laptops. I own a Toshiba, HP and an Asus. I've managed to repair several Dells by dismantling (using downloaded service manual) and removing and repairing the power socket. It is a bit fiddly, but seems to be a reliable repair, and cheaper - just a bit of solder and Araldite - than the Dell suggestion of a new system board. There was one which had a frayed power lead, but a bit of solder fixed that too. hth Nel |
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