I have a 2 year old Hitachi 55hds69 plasma tv. It shut itself off and will not restart. The blue power light does not come on, only the red standby light. The tv does try to start, makes a clicking sound for a few seconds, the red light goes out at this time, then nothing.

Hi,

•    Take the Televison to a repair shop and replace the power unit.
  

Hiii.....
If the power supply is supplying the main board with the correct amount of volts, your controller board or your on off switch panel is malfunctioning and needs to be replaced. If its the whole board your looking at a few hundred unless you can find the same tv with a broken screen and just swap parts.The on/off switch board is cheaper but you have to remove alot of interior parts to access and becomes a hastle.
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You need to check the fuse initially if it is good .
Then next part is power supply board. There can be various reasons for shutoff. Bad soldering can cause this problem.
Power supply board replacement can be done by you if you have any previous experience in handling electronic items . Else leave it to
technican to do the replacement job.
New power supply board will solve your problem .

You can find parts from the link below

Parts for hitachi tv

Hope this helps .

A repair man is not needed but unless you are fully confident in your ability it is not really wise to want to cause further damage. I would still recommend locating the nearest service center and inquiring about an estimate. You can do that at this link.
http://www.hitachi-homeelectronics.us/Apps/ServiceLocator/ServiceCenterSearchForm
If you need further assistance let me know. Also please take a moment to accept and rate my solution accordingly.
Thank you,
Lee

Your power supply board ned to be replaced..it will cost..contact hitatchi service center....

Hi!
It is in self diagnostic mode. It has sensed a high voltage power failure and due to that it has entrred the diagnostic mode.
And to see what code it is,you have to active this function. First turn it off (master power on in stand-by) then on the plasma you push and hold the (sub) power button and the down arrow at the same time and hold them for 5 seconds after it comes on. this will activate a series of red LED flashing a code. The code will blink 1/2 second on, 1/2 second off till the total count is done then it will stop for 2 seconds and repeat. Any other function button will stop the diagostics. One blink maybe the Logic board, two blinks the X-Sus board, three blinks maybe the Y-Sus or the Scan driver module (SDM), four blinks maybe the X-Sus, Y-Sus, SDM or the Power Supply (PSU), five blinks maybe the ABUS, the Address driver module (ADM), or the PSU, six blinks maybe cause by the ADM temperature, and eight blinks maybe "all the above-mentioned boards.

lease revert for any clarifications.
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Thanks Rylee

The power supply is bad. Not the power cord, the supply inside of the TV itself. It is an electrical board.

You may still have some warantee left, check prior to messing with it.

If its making a clicking sound and does not come on, it definitely the main fuse from the power supply. It is either burned due to power surge causing it to be opened. You need to replace that.