Power Problem Toshiba C650

[Alienpato]

Hi ALL, I stumbled onto this whilst on a solution seeking mission for my troubled second hand bought Toshiba satellite C650 laptop.I am saved, I hope.

It originally had a bios password which I wanted to by pass and I messed up big time by shorting pads in the memory bay (stupidly of cause) as suggested by a couple of FAQs I read on other sites.

The LED for AC and Battery shows, however on power up, the green LED blinks lazily at first and blanks out completely and the processor fan starts but ceases in tune with the green LED.

I left it as that and I hope to get the right info on it this time before I completely wreck it. A schematic would be great too.

Happy New year

Alienpato

[TechShui]

Re: Power Problem Toshiba C650

It sounds like you killed that RAM slot, have you tried putting just one stick of RAM into the other slot?

That model has at least a few motherboard revisions, and I haven't found the schematic for any of them.

However the problem seems pretty straightforward, you have a bad slot, and maybe a bad RAM controller (southbridge). Unfortunately these are not easily repaired.

EDIT: I just remembered the later revision of the c650 used a G1 socket, for i series chips. Which IIRC have integrated memory controllers. In a nutshell, replace the CPU and see if it boots.

[opamp]

Re: Power Problem Toshiba C650

Can you explain how were you by passing the bios?

[Alienpato]

Re: Power Problem Toshiba C650

It sounds like you killed that RAM slot, have you tried putting just one stick of RAM into the other slot?

That model has at least a few motherboard revisions, and I haven't found the schematic for any of them.

However the problem seems pretty straightforward, you have a bad slot, and maybe a bad RAM controller (southbridge). Unfortunately these are not easily repaired.

EDIT: I just remembered the later revision of the c650 used a G1 socket, for i series chips. Which IIRC have integrated memory controllers. In a nutshell, replace the CPU and see if it boots.

Thanks TechShui, I shall give that a go.

[Alienpato]

Re: Power Problem Toshiba C650

Can you explain how were you by passing the bios?

The machine had a power-up password so gathered info suggested that it is the BIOS memory that holds this password.

The usual F1, F2,ESCAPE functions and even complete removal of the CMOS battery failed so sought advice of shorting certain pads in the memory bay whilst powering-up seem like a technically good idea.

True enough I found PAD 3000 and PAD 3001 under the RAM and proceeded to shorting them while powering up.

And that was when I had my power problem.

AM not too sure about the revision and where shall I look for this info.

[opamp]

Re: Power Problem Toshiba C650

I don't think swaping the cpu is going to help. You most likely have shorted component that's why is turning off by itself.

[Alienpato]

Re: Power Problem Toshiba C650

I tried just 1 RAM but did not improve.

My problem have took a turn for the worse, since the last time I posted; the laptop is now seemingly dead.
No LED indications with AC or battery altogether. It could be just easy to say the batts gone but I guess I really do need that schematic to see what I shorted first. PAD 3000 and PAD 3001??

[goodbrethen]

Re: Power Problem Toshiba C650

I tried just 1 RAM but did not improve.

My problem have took a turn for the worse, since the last time I posted; the laptop is now seemingly dead.
No LED indications with AC or battery altogether. It could be just easy to say the batts gone but I guess I really do need that schematic to see what I shorted first. PAD 3000 and PAD 3001??

I have one schematic for toshiba satellite c650, I hope this is the one your looking for.

[Alienpato]

Re: Power Problem Toshiba C650

Thanks G,
What you posted is helping. I am in the telecommunication industry and I guess my flame for electronics rekindled ever since my laptop turned south and I found this site.My motherboard revision is A03 and PAD 3000 and PAD 3001 is not on the one you sent but I guess the schematic is pretty much the same.
Anybody with with a schematic for A03?

[galmoham]

Re: Power Problem Toshiba C650

Thanks G,
What you posted is helping. I am in the telecommunication industry and I guess my flame for electronics rekindled ever since my laptop turned south and I found this site.My motherboard revision is A03 and PAD 3000 and PAD 3001 is not on the one you sent but I guess the schematic is pretty much the same.
Anybody with with a schematic for A03?

please i would like to know if you have been able to solve that problem of yours as i have also done the same thing on the same type of machine so please kindly help me out if you have been able to solve your problem please