My hp pavillion a530 wont turn on i havent turned it on in a while but it worked fine about a year ago now it wont even turn on

Hi,

There is a good chance that the power supply is faulty. This occurs because there are high voltages present in a power supply when in use. Electronic components have a tendency to be very reliable when in constant use, but when they are not used for some time and then suddenly receive current when turned on, they often blow due to the sudden flow of electrons.
Try obtaining a working power supply from another computer and test if your PC switches on. If this does not solve the problem then I would suspect a RAM problem.
Remove the RAM from the motherboard and clean the contact points using an electrical pc board cleaner. This is also a common cause of a PC not turning on.

Please don't hesitate to contact me again should these options not solve your problem.

Best wishes,
Graeme