HELP!!!!infinity stoped powering up.PLEASE HELP!!....

[no boom]

I have a infinity PS-12 that no longer powers up, I'm not sure what to check.did check fuse...its ok...PLEASE HELP...thanks

[premanton]

1. Check the remote switch ON where you would need to connect a 12Vdc to a terminal named REM or remote
2. with a miltimeter, check that none of the transistors is direct shorting with the GND
3. The ferrite core for the DC to AC conversion could have become magnetized and this is not making the PWM IC usually TL494 or uPC 494 to bode well at switching at high frequencies.

If it permits, try changing the DC to AC transformer with a new one from the manufacturer and at the same time change the TL494 or else uPC 494. DO this change only after all the transistors have been checked for short circuit conditions.

[no boom]