I have a Pioneer PDP-LX6090 standby lamp flashes twice

SOURCE: Pioneer PDP-5030HD power supply

click link -ebay shop selling power supply boards for 503hde/pe at 180 pounds you will have to contact him has he does not list them as pioneer are only ment to replace these boards or shops under contract with pioneer i changed mine and only takes min's when you have got the back cover off...

http://stores.ebay.co.uk/Plasma-Parts-UK

hope this helps mark doran

SOURCE: replacing X-Drive in PDP-4340HD (power supply problems)

Before you call pioneer,you need to be sure your media box had plenty of ventalition on the back.
Secondly,if you could locate another connection cable(one from the media box to the tv)and have it replace your existing one and see if that works.
Once you have tried both troublshootings shown above with no result,at this point,you should call 1-800-pioneer.best time to call will be Tuesday-Thursday at 7am PST.
solutiondoct

SOURCE: Pioneer PDP-503PU

Very possible,but yet,this might be the manufacturer defect power supply which they will fix it for you free;but before we jump to this conclusion,you need to test it first:
-Unplug the power cords.
-Unplug the media video cable from the box to the tv.
-Check all the pins on the video cable are in place as well as the connectors both behind the TV and the media box.
-Reconnect the media box and TV with the video cable(DVI+VGA in one) and have at least a video component hook up to it(ex. dvd player/VCR or comcast box) be sure this video player is turn on and running,at the same time,be sure it is under the right video input.
If you have tried the above steps but still doesn't work,call 1-800-pioneer Tuesday-Thursday at7amPST and address your issue to them.
Let me know if you have any additional questions!
solutiondoct

SOURCE: My Pioneer PDP-507CMX won't turn on. Standby light

wot is buttons&ir lock

SOURCE: my pioneer pdp-434hde will turn on for about 3

check y board and power supply