[dacoma09]

my 003 suddenly stopped powering up. It powers on and randomly turns on and off repeatedly.
Electronic repair guy says it is the power supply chip 21Z0501 that is faulty due to overheating.
Have searched the internet and cannot find this chip ( although I have the faulty chip in my hand while searching)
Does anyone know of a replacement chip that would work in my 003 console?
(Image attached)

Mac user, pt10-12, 003 is 15 yrs old, located Texas..

All help , comments are greatly appreciated..