POWER LEAD OK , BATTERY ASUME OK BUT WHEN PRESSING START BUTTON -NOTHING -THE LED WITH SYMBOL A LEAD FLASHES IN THIS SEQUENCE 5 FLASH'S PAUSE THEN 3 FLASHES PAUSE -5 FLASH'S - 3 FLASHES ETC
ANY IDEAS ?
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Test your PSU or replace it if your power supply units fan is not working your PSU is faulty
One bad lead can cause a computer to continue on a cycle or to shutdown or fail to detect/ boot up a computer hard drive
Test all leads that attach to your hard drive including electrical extensions,IDE,SATA
the leads from your ((motherboard to your hard drive)) make sure they have a secure connection and are not faulty or just replace them there probably old and faulty make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty even the electrical extensions or just replace them they are probably old and faulty a computer needs its connections to have an end so any faulty leads will end up with a computer error
Power supply has several voltages. Just because the 5v power is active doesn't mean all the voltages are OK. You need to have the power supply tested for 12v and 3.3v. A quick test is to unplug all the wires from the power supply. There is a single green wire on the motherboard main plug. Connect (use a bent paper clip) that green switch wire and any black wire. Plug in the power supply and it should run (fan starts)
If you are recieving power from just the Power cord without the battery. This could be a bad battery. If you are recieiving power but no video it would also be bad RAM. Try taking out the ram one piece at a time and testing one at a time. That should give you a better idea.
1. Remove all USB devices such as printers, mp3 players etc etc.
2. Remove the power-cable and the battery
3. Press and hold the power button for 30 seconds
4. Put the power-cable back in but not the battery and none the USB devices.
5. Turn the computer on
Also check the condition of the USB ports if it doesnt work and the fuse. If this doesnt work then I would recommend a repair.
try another wall outlet first. if it still doesn't turn on. then you going to need a meter in order for you determine if the power supply is at fault.
put the postive (red) lead to the positive side of the power supply output lead (+) and the negative to the negative. if your read 12V on the meter. the power supply is good.
if the power supply is good. then, take out the battery out of the laptop. push and hold the power button on the laptop for 20sec (resetting the laptop). replace the battery and the AC. if that don't work. then you have other power problem.
You might have a bad power supply. If you have a voltmeter, check the voltage of the standby power supply. This voltage is present even if the system is off, plugged in. It powers a small portion of the logic circuit. It should measure within a couple of tenths of exactly +5 volts. If it is low, or high, this will prevent turn-on. The purple wire of the 24 pin connector is what carries this to the motherboard. The color coding layout is found at http://pinouts.ru/Power/atx_v2_pinout.shtml
If by chance this voltage is OK, then check the full on voltages also.
Repair of the defective supply is probably by replacement of one or more small electrolytic capacitors in the appropriate circuit, especially if you are technically savvy. Capacitors are available through several suppliers; Digi-Key supplyies Panasonic FC series which are suitable for switching power supplies.
Or, you may just replace the whole unit.