PDP5060 red light blinks 3 times

SOURCE: Pioneer PDP 5030 power supply problem

Ok here's how I manage solve the problem... Having the back removed opens the contacts on the interlock switch so I guess if it powers up in this state it senses the high voltages are exposed and for safety shuts down... After this the unit will not power up and the power led flashes red continuously as described before…
After some thought it occurred to me that there may not be a problem at all, just be a simple reset function for this condition… I managed to find an easy solution to this… Just call up the hidden engineer’s service menu – On 3rd generation Pioneer Plasmas it’s as follows > Power down the screen > Hold down the “Input” and “Vol +” buttons on the front > Power the screen up and the Service menu comes up on the screen > You don't need to change anything just simply power off and from then the screen should operate as normal…It did for me so I’m well happy now!!
I hope this information will help someone else one day – Good Luck!!…Rob UK…

SOURCE: pioneer plasma no picture with blinking red light

this requires a replacement of the power supply board. This is per Pioneer tech support whom resolved my issue when I called. Hope this helps!

SOURCE: Pioneer Elite Plasma TV

This a factory issue and usually requires service. Most cases it is a bad power supply caused by a surge or powering off and on too fast ... sorry I wish I had better news

SOURCE: TV keeps shutting off automatically

Since your plasma is less then a year old, I would suggest to contact the manufacturers to get it fix under warranty. If the plasma keeps shutting off by itself, that is not normal and should be repair.

SOURCE: my 60''pioneer plasma blinks 12 times after i turn it on

looks like 12 blue blinks is a communication with the Digital tuner error. pioneer had a software upgrade/fix for this in some cases, others might need a new digital tuner pcb. I would unplug all power, wait 5 min, plug in (wait1 min) and try it again. If it is software, it should hopefully work. Make sure you pull your cable card if you have one. If it still won't turn on, you probably need the digital tuner board = $200-500 repair. Pioneer is usually very helpful, I'm really surprised they didn't help at all.. They'll want model #, serial # and date of purchase.