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R50 display garbles from AC to DC

post #1 of 9
5/14/08 at 5:42pm
Thread Starter 
Hello all,
This is my first post so please bear with me.
I have an R50 that functions fine as long as the computer remains plugged in (AC power). However, when within 15 seconds of unplugging the unit, the system freezes, there is a click (as though it is checking the hard drive) and then the screen goes into vertical lines, or 1 inch horizontal lines and then in waves for about 10 seconds and then the screen goes blank.
Any help would be appreciated, thank you.
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post #2 of 9
5/15/08 at 9:11am
. when did this happen?
. what have u tried so far?

cheers ...
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post #3 of 9
5/15/08 at 11:13am
Thread Starter 

R50 display garbles from AC to DC

Thanks for a response
This was not my first problem with this computer. I was getting many error messages on blue screen. I would attempt to resolve, and figured a way to temporarily resolve. Then it got bad enough to have the hard drive replaced. This was done about 3 weeks ago. That resolved all the blue screen error codes. Then this problem seemed to surface, but it was present before the hard drive was changed.
I have since decided to really make an effort to solve this, and have done the Thinkvantage system updates, windows xp updates. Have installed driver detective (but unsure how to apply chipset drivers-so left that for now).
If I attach an external monitor, then the external works and the r50 screen is blank. I press fxn-f7, then applied the analog for both screens(the bottom choice best fits, as the external monitor is not a projector). The print changes (lower graphics I guess), I then have both screens, then when I unplug the AC, the cursor freezes and the unit remains with both screens frozen. Must then power off and restart unit. Also tried a new battery. Also tried to lower graphics accelerator (all levels)in display section.
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post #4 of 9
5/15/08 at 11:41am
it seems to me you are having motherboard problems, so if you have it under warranty yet, consider replacing it for a new one!
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post #5 of 9
5/15/08 at 12:37pm
Thread Starter 
That is a possibility, however, when I run PC Doctor 5, or the old version of PC Doctor it comes back with no problems. Device manager also shows no problems.
Thanks
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post #6 of 9
5/15/08 at 12:51pm
Quote:
Originally Posted by gpddc View Post
That is a possibility, however, when I run PC Doctor 5, or the old version of PC Doctor it comes back with no problems. Device manager also shows no problems.
Thanks
I believe you found no errors/issues when using PCD. There are sometimes issues that no software can detect. You can either point to mobo (most likely) or lcd inverter / flat cable (unlikely because you keep having same issues with external video)
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post #7 of 9
5/16/08 at 7:01am
i m afraid that i would 2nd besunta in the direction of a bad mobo - since the gpu (ur screen presentation behaviours) itself is being soldered/integrated onto it

cheers ...
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post #8 of 9
5/21/08 at 12:29pm
Thread Starter 
Thank you besunta and qhn. Does the inverter only apply to the lcd screen, or to the conversion from AC to DC power for the entire laptop?
It would seem that the conversion from AC to DC power is the issue, and if this is what the inverter does, then that is any easier fix(You can tell that maybe I am in denial about a motherboard problem!)
Any thoughts are appreciated.
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post #9 of 9
5/23/08 at 7:11am
the inverter relates mostly to the lcd. if u think that it is a matter of power conversion, then try a different ac adapter first and see.
it is not so simple just to replace/fix a circuit component of the whole board, time & effort r probably not worth it

cheers ...
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