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Sony Vaio Problems

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Bartekuk

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Posted December 21, 2011 at 8:09PM

i have brought a sony vaio pcg-791m laptop for spares/repair i thought it is an easy fox as it said that its a blank screen i have fixed a laptop with blank screen before but this laptop seems different the symptoms are when i have the power plug in the battery light flashes im not shore if this is ok or not but when i press the on button the 3 lights at the top stay on all the time and all the light on the bottom except the battery button but when i try to shut down the laptop by pressing the on button the battery light comes on and it depends on how long i press the on button the light will come on eg if i press the power button on for 1 minute the battery light will be on for one minute at the same time what every i do the screen does not respond i tried removing hdd and ram but still nothing tried booting without battery or with still nothing and now i have no ideas what to do next so please help me

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You Lose

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Posted December 21, 2011 at 8:16PM

If the battery light is flashing when plugged in, that means it's charging. Have you removed the BIOS battery and left everything unpluged for 30mins? your bios might be corrupt. if you haven't then its worth a try

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Bartekuk

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Posted December 21, 2011 at 8:19PM

does this mean that i have to disassemble the laptop to its mother board ??

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You Lose

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Posted December 21, 2011 at 8:21PM

Yeah :) should be pretty easy to do.

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Bartekuk

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Posted December 21, 2011 at 10:27PM

do you have any other suggestions ?

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You Lose

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Posted December 21, 2011 at 10:53PM

Well, ive had two laptops that has had similar problems - blank screen and all. Most of the time it comes down to a faulty motherboard. Try plugging it into a external monitor and see if anything comes up, If nothing happens - try disconnecting the laptop screen from the Motherboard; try again like that. Be sure to take the laptop battery out and power supply & hold on button for 30seconds to empty the caps.

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Bartekuk

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Posted December 21, 2011 at 11:09PM

well i tried to put it through external monitor and pressing fn + f5 to switch but it said no signal and tried the thing with holding the power button for 30 to 60 secs but have not tried to disconnect the screen

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Lazarus The 2nd

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Posted December 22, 2011 at 12:42AM

On all my Sony Laptops it's fn + f7

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Bartekuk

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Posted December 22, 2011 at 9:33AM

its different keys on different keyboards but im talking about the switch button between screen and external monitor

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Bartekuk

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Posted December 22, 2011 at 9:36AM

im not shore if the battery is not dead aswell as i was charging it for about a hour or more and when i disconnected the power supply i had no response when i pressed the power button

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Fruit Bat /\0/\

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Posted December 22, 2011 at 10:41AM

Remove battery, try on mains only.

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