Hitachi plasma hd1080 has no pic and blue light blinking

Those blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.
http://electro-medical.blogspot.com/
http://homenol.blogspot.com/
http://electronicshelponline.blogspot.com/
If blinks continue without any pause, the main board is faulty.
Search the site by type in the "brand name" to your device, [Exclude the model number] in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

Found this link for you. May not be your issue, but good luck.

https://www.avforums.com/threads/hitachi-l19d01uwk-volume-control-problems.1193173/

Main board is possible but power supply board should first be tested.

Depends on model but the set is in shutdown as something is wrong.

my hatachi hd/1080 tv has a solid blue light on and it wont turn on i push the reset button on the bottom right and it still wont turn on

turn tv on and screen does not come on power blue light blinks three times.

Ur power board inverter is dead.
U need a new board.

http://www.hitachi.ca/supportingdocs/en/forhome/plasma_tvs/42HDS69.pdf

Here is the user manual. You may need to call Hitachi.