Reset bios on a Toshiba l655-s5154 laptop

[KC Tech]

I recently did a fan swap on a clients computer. When I reassembled it plugged it in and turned it on, only the backlight came on. I did some research and forums said that resetting the bios would solve this problem.

I would like to ask if anyone knows reset it, or if you have any other ideas on what the problem might be.

Thank you

 

[NYJimbo]

resetting the bios MAY solve this problem.

Did you google how to reset a bios ? Its pretty much laptop repair 101.

Also reseat anything you can get easy access to.

Hopefully you didnt put the wrong screws in the wrong holes, too long a screw in too short a hole can cause a short or worse.

 

[KC Tech]

I put the right screws in the right holes. It's just powering up, the screen is lighting up. but nothing shows on the screen. Do you think I need to reseat the processor? Thank you for the help by the way and I'm sorry I took so long to reply

 

[compnet]

I put the right screws in the right holes. It's just powering up, the screen is lighting up. but nothing shows on the screen. Do you think I need to reseat the processor? Thank you for the help by the way and I'm sorry I took so long to reply

If it worked before you did the fan, you didn't plug something in, or something is assembled incorrectly. Your "client" isn't mad you are two weeks over on a fan replacement?

 

[NYJimbo]

Do you think I need to reseat the processor?

Well, since the processor is pretty much the final item in a tear down of the L655 (did you even have to go that deep for the fan ?) I still think you should try reseating everything else first. Easy stuff then go deeper. I'm just gonna leave it at, good luck.

 

[Reegs]

Try swapping out memory. Or take out all of the memory to see if the POST will even start.

Maybe you shorted something during the teardown or reassembly phase.

I had just recently had a similar satellite in the shop with bad memory. Showed pretty much the same symptoms. One of the two memory sticks was bad. Took out the bad one (lucky first guess) and it started right up. I reset the bios by taking the battery and mobo battery out and holding in the power button for a min or so.

 

[KC Tech]

The problem is the screen. Everything showed fine on a external monitor I plugged in. I have to check all the connectors for the screen and possibly order a new one. Thanks for the help.

 

[Reegs]

Might also want to check the "lid closed" switch. I've seen these get stuck and not let the screen come on.

 

[NYJimbo]

The problem is the screen. Everything showed fine on a external monitor I plugged in. I have to check all the connectors for the screen and possibly order a new one. Thanks for the help.

Ok, so it was booting you just didnt see anything on the screen. This is why its really important to note the difference between "only the backlight came on" and "it looks or sounds like its booting but I dont see anything on the screen".

 

[KC Tech]

Thanks reegs I'll check that out. NYJimbo thanks for trying to help also but why are you so aggressive with your post. I described the problem as I saw it. The backlight came on but nothing showed on the screen. I left it on for an hour to listen out for the windows boot sound but didn't hear it. All I heard was the fan turn on, turn off, then nothing.

 

[NYJimbo]

I described the problem as I saw it. The backlight came on but nothing showed on the screen. I left it on for an hour to listen out for the windows boot sound but didn't hear it. All I heard was the fan turn on, turn off, then nothing.

The L655 has a hard drive light, if you were smart enough to listen for the drive you are smart enough to look at the obvious hard drive light. Since it did boot you would have seen the hard drive light. That's the point I am trying to make. If you say that only the back light came on then we assume nothing else happened and then we go down the list of things to try.

But since you knew enough to try to listen for the HD activity certainly you were able to notice the very noticeable blinking led on the front marked with the HD symbol that would show you it was booting. I mean you had it up for an hour.

Unless of course you don't know what the hard drive light means, well then thats something else altogether.

 

[KC Tech]

There was no hard drive activity. It stopped at a screen that asked is you wanted to do a windows start up repair therefore there was no hard drive activity until you made a choice. I have a laptop which I use daily and I know how the hard drive sounds and about the activity light. There was nothing on the screen and no hard drive activity.

 

[NYJimbo]

There was no hard drive activity. It stopped at a screen that asked is you wanted to do a windows start up repair therefore there was no hard drive activity until you made a choice. I have a laptop which I use daily and I know how the hard drive sounds and about the activity light. There was nothing on the screen and no hard drive activity.

Impossible. There is noticeable disk i/o up to that point and then if you do not select the windows repair on the "windows error recovery" it will boot after counting down a timer. In most cases it will boot to the repair. So there would be a lot of disk i/o and it would be clearly visible on that HD light. You also said you had it up for an hour so it would have kept doing disk i/o. I work on that model all the time and that model almost always has windows 7 loaded (unless they downgraded for some reason which I doubt) so thats how it would work.

Look, you made a mistake on diagnosis, we all do it sometimes, but I was only trying to tell you that when you ask for help you have to be more specific with what you see. If you were listening for disk i/o why would you not also be looking at the light on the front which is impossible to miss.

If you would have said "I only see the backlight come on and then there is alot of disk drive light flashing" I can tell you a dozen techs here would have told you the first thing to do is hook up an external monitor.

 

[KC Tech]

You say you work on this model all the time. Where would be a good place to order parts for it? I'm looking for the cable that connects the lcd to the motherboard.