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07-07-2012

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R51 Blank Screen--Cant Boot Up

2012-07-07, 5:49 AM

my r51 machine used to be nt functional few days ago....when i try to boot it up,only battery icon & charging icon light up,cpu fan spinning;HD light nt lighten up,cd drive also nt functioning.....


i tried removing both ram under keyboard & bottom of the machine,reinsert them...but still no sign....


just now my laptop finally boots up,bt i only managed to use about 20 mins,then suddenly it went blackout..still,only battery icon lights up..


now i hv trouble booting up the machine...any guides here?

 

just now i saw posts which says removing & reinsert cmos battery might help...i've tried that,didnt give any sign of revive...

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21115 Posts

12-20-2008

Australia, Melbourne

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Re: R51 Blank Screen--Cant Boot Up

2012-07-07, 9:31 AM
it is probably the result of the ATI GPU detaching from the motherboard.

Regards,

Jin Li

May this year, be the year of 'DO'!

I am a volunteer, and not a paid staff of Lenovo or Microsoft
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Re: R51 Blank Screen--Cant Boot Up

2012-07-08, 5:13 AM

yesterday i've disassembled my r51.....it doesnt seem to be disconnected......fyi,the graphic chip is intel......

now i'm curious about this:why is the laptop doesnt make any beep sound after removing the 2 ram?

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21115 Posts

12-20-2008

Australia, Melbourne

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Re: R51 Blank Screen--Cant Boot Up

2012-07-08, 5:31 AM
http://www.youtube.com/watch?v=4mUvdIjd6OM

you have similar problem as this? it could be an intel south bridge issue.

Detaching GPU problem isn't really the GPU coming off, but that microscopic cracks form in the solder that connects the GPU to the motherboard.
Regards,

Jin Li

May this year, be the year of 'DO'!

I am a volunteer, and not a paid staff of Lenovo or Microsoft

0 person found this solution to be helpful.

This helped me too

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Re: R51 Blank Screen--Cant Boot Up

2012-07-08, 5:57 AM
hey!i didnt try that yet~~!
will try it when i'm home!
thanks for giving help!
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Re: R51 Blank Screen--Cant Boot Up

2012-07-08, 17:16 PM

it seems like the issue is on the gpu ...it really needs reflow...but i dun have adequate knowledge on that...so i folded a strip of hard paper & placed it on the gpu.then i reseat the keyboard,which will indirectly give pressure on the gpu(th paper strip height is approx slightly higher than the spacing between gpu & keyboard)...

 

at first it didnt work,so i further pressed the keyboard a little bit..OMG it finally worked!so i boot it as usual,and let my machine to become warm...after that i remove the paper strip,reinsert keyboard,and reboot.thankfully it worked as usual.

i think it's because while i'm using the laptop the warm temperature slightly "reflow" the gpu solder in place.....

 

thanks for every guide that you give me!:manhappy:

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2252 Posts

01-02-2011

US

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Re: R51 Blank Screen--Cant Boot Up

2012-07-08, 21:53 PM

What you have is contact conduction across the crack and it's a temporary fix at best. You really need to reflow this chip. If you remove the board there are places that will do it properly for a reasonable fee, or you can try theboardroom.info, they may have a very affordable replacement board for you.

ThinkPad W-510 i7-820QM(1.73-3.06GHz) Quad Core... ThinkPad T500, T9900, 8gb SSD...FrankNpad T-60p/61p (X9000 2.8ghz) 8gb SSD ips FlexView...ThinkPad T-61p (T9300 2.5ghz) 8gb ram...Thinkpad X-61 Tablet 8gb ram.
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