Just to clarify (as already has been done) do not open the case of the power supply
. Ignatz was referring to the computer case only, then look carefully on the main board for any capacitors (capacitors are the round, cylindrical components) showing signs of 'bulging' (they will appear to have inflated compared to other, normal capacitors).
When buying a new power supply, always try to get something which is of a slightly higher wattage (the number with a capital W next to it) than you have currently and do not
go lower than the number on the one you have now.
A good guideline is that if it costs around £30-50 (British Pounds, sterling) then it is very unlikely to break.
Quote: Originally Posted by ignatzatsonic
Most likely the power supply failed.
If you are a bit lucky, nothing else was damaged.
Your best move is to open the case and look for signs of damage--bulging capacitors, signs of scorching, etc.
If it looks OK, try to borrow another power supply to see if it will power up your PC. If you can't borrow one, you may have to buy one.
Decent power supplies may be hard to find in Bangladesh--I don't know. The best way to avoid power supply problems is to buy a good one rather than a lot of the junk that is out there.
There isn't really a good way to test power supplies without special tools, which I assume you do not have.