Hitachi Televison & Video - Recent Questions, Troubleshooting & Support

You didn't mention the model so I don't know how old the set is, but its possible the CCFL tubes are getting bad and not putting out the light they used to

Hitachi... | Answered 3 days ago

Could be an open internal fuse or power supply failure. Bet the "tech" didn't check either before trying to sell you replacement boards.

Hitachi P50A402... | Answered 3 days ago

The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
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.

Hitachi 42HDM12... | Answered on Dec 05, 2017

Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main digital board.

Hitachi... | Answered on Dec 05, 2017

Its not a matter if it sitting, it got a power surge that did some damage to the power supply...might be as simple as a fuse

Hitachi... | Answered on Dec 04, 2017

It could be the eprom but its a difficult part to replace without a lot of soldering experience, I would change the board. Measure the PSON or PWRON, or how ever they have it labeled to see if you have a voltage change there when the power button is pushed.

Hitachi... | Answered on Dec 03, 2017

If the tv was on when you unhooked it there is a cooling fan that didn't get to cool off the picture box and it has overheated and you will have to replace the box you can order it off of eBay it takes a few moments to replace it if you still have your owners manual it will tell you all about the lights on the front of your tv I've had to change mine out a few times hope this helps Merry Christmas

Hitachi 42HDT79... | Answered on Dec 03, 2017

Replace the main board and it should correct this, if it did it all the time I'd say its a bad speaker but since it works ok to start with sounds like a bad audio output chip in the main

Hitachi... | Answered on Dec 02, 2017

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