Having problems with your Toshiba Satellite A105 Notebook ?

Laptop will not come on

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\015 I have a toshiba laptop. A few days ago the computer was frozen on the screen saver so I tried ctrl-alt-del and that did not work so I turned it off and waited and turned it back on again. Well nothing happened. The lights come on, the hard drive light just for a second, but nothing else happens.Please help.\015

Answers :

Although other possibilities can be at fault, if it does so little after power on, the CPU itself may have failed.\015\012The very first actions a PC does when turned on is to read the information stored in the CMOS to determine what hardware is on board.\015\012After doing this, it turns to the hard drive for a check to see if it is readable and then the CPU (your microprocessor) Intel or AMD takes command.\015\012If the hard drive is at fault, a message will inform you that the hard drive either cannot be found or is unreadable.\015\012If the hard drive light flashes once, then the BIOS  has made contact and then the hand-off to the CPU begins.\015\012If it is stopping dead at that point, the CPU is the prime suspect.\015\012
\015\012What fairly often happens is first a failure of the CPU fan that sits directly on the heatsink that transfers the heat from the CPU and then the heatsink is bathed in air from the fan.\015\012If the fan has failed (all too common) or is impeded by a dust accumulation, the CPU overheats and if the maker has not made any provisions to shut down the CPU, it dies.\015\012
\015\012There is a possibility that this kind of problem can be caused by a failure of the RAM (memory) but establishing what has failed is only possible through substitution of one or both of those devices.\015\012
\015\012If you are somewhat skilled, opening a laptop requires small Phillips screwdrivers to remove case screws from the side(s) and bottom, then the case still (in most cases) needs to be carefully pried open. The mating halves normally snap together as well as being fastened with said screws.\015\012
\015\012Most likely the keyboard will also have to be freed from a couple of screws and, depending on the length of the flat cable connecting it to the system board, can be pulled forward before or after the cable is pulled.\015\012
\015\012The CPU will be easy to spot; it's one of the large clumps on the board.\015\012Check its fan to see if the blade turns freely and is not impeded by dust (these things have hardly any torque), then with two fingers, positioned on either side of the blade, check to see if it rocks side to side.\015\012This would be an indication that the bearings have failed and it will need to be replaced.   \015\012The CPU is held by clips but make sure you have no static charge before removing any internal part. Just 'equalize' the charge by touching an exposed metal cover or other chassis part.\015\012Memory is normally accessible from the bottom of the case.\015\012
\015\012Now comes the bad news; there are still myriad other components that can keep a PC from booting when no error message is present since there are numerous support functions which can interfere with the startup of system.\015\012I've given you the most likely points of failure; CPU or memory.  
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