The issue is can power up but take 15-20 mins to warm up and then work for CD. Oh another supply issue for pioneer? It is.
After open up, check the supply board and it is a little bit sicky and seems like ecap leakage. Thus take out few and measure and conformed the issue. Thus change all the caps 100% except the high voltage cap is using Japan brand. Also touch up all the solder joints and paint the casing at rusty locations besides cleaning.
Lesson learnt: Pioneer is a good product but many model buy a cheapy power supply from somewhere which use cheapy non Japanese capacitors to make the product to last 5-10 years!
One more problem, the FWD button become STOP button, checked resistors on the control board is fine. Later found the 5V is a bit low and thus modify one resistors to bring up the voltage to 5.2V, now the FWD button function without issue. Reason is that the keyboard use resistors to set the input voltage for the MCU ADC to measure and determine what button is pressed.
Good design product and easy to disassembly for service.