Thank you for your time in advance. I will try to keep this short. I am repairing a laptop. A Toshiba Satellite L655. Originally, on start up, the fan would make a few revolutions and then quit. The computer was obviously over heating and this is what brought it to me. Speed fan was unable to recognize the fan so I broke it down to check the fan. Fan is a sealed unit and seemed to turn easily. As it was trying to turn at start up, it made me think the mother board was bad. I went to start the board after putting the fan back in place (at this point, board + AC power + LCD/camera mic + Fan + tactile power button all connected) and the board if I remember right appeared to start up but the microphone at the top began to smoke so I quickly pulled the power a few seconds later. I broke down the LCD to find that the microphone and camera chip had visible burns on it. Now, the microphone has separate cable but appears to share the same connection as the LCD screen which makes me worry about the LCD. As of now, the board refuses to do anything. I get a power light and a battery charge light with the battery in but it refuses to power on. No fan, no lights, nothing. The power button is separate and connected by a ribbon cable, is their a way to be sure it is not faulty? I am prepared to replace the motherboard but I want to be sure that is the problem as these boards are quite pricey. Other things i've tried, for the heck of it, I disconnected the LCD and am using a VGA monitor. I -think- I reset the CMOS. I took out the round battery on the motherboard and left it out over night with no AC power but still nothing after replacing it. I'm considering removing the keyboard of another laptop of mine to check the LCD screen on that laptop. Any help would be much appreciated.
Dead laptop power button or motherboard?
- Thread starter Erican
- Start date
NerdyComputerGuy
Distinguished
- Nov 19, 2013
- 1,446
- 9
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I would recommend taking the Laptop for a repair under warranty (if there is actually any warranty on the machine) you mentioned burn marks etc.
This is very bad and unless you are a qualified electrician I wouldn't be touching the inside parts as it seems to me that the computer is dead but could still retain electrical static
Replacing the motherboard would be a hassle since you need to know the motherboard name and you need to re-insert the CPU among other things
I would advise that you either get it fixed by a qualified technician who has the parts or get a new laptop
This is very bad and unless you are a qualified electrician I wouldn't be touching the inside parts as it seems to me that the computer is dead but could still retain electrical static
Replacing the motherboard would be a hassle since you need to know the motherboard name and you need to re-insert the CPU among other things
I would advise that you either get it fixed by a qualified technician who has the parts or get a new laptop
Well, that would be the very last resort. Assuming the LCD works and CPU/ram are undamaged, I would still replace the motherboard and the Mic. I am comfortable with computer components and power supplies. I have the parts already identified. Due to the lack of a power button on the board its self, any suggestions to eliminating the external button as the faulty component?
And to clarify, as I cannot rule out that the fan controller on the board was the problem before it shorted out, I am going to be covering the costs of this new motherboard which comes, out of pocked for this customer. If replacing the board and mic makes the existing fan work again, then I can rule out that despite what happened, the board was faulty before and avoiding covering the cost of this somewhat pricey repair to this customer.
And to clarify, as I cannot rule out that the fan controller on the board was the problem before it shorted out, I am going to be covering the costs of this new motherboard which comes, out of pocked for this customer. If replacing the board and mic makes the existing fan work again, then I can rule out that despite what happened, the board was faulty before and avoiding covering the cost of this somewhat pricey repair to this customer.
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