20 Most Recent Hitachi P42H401 42 in. Plasma HDTV Questions & Answers

IF you got a good board and a lot of replacement boards aren't good the only other thing that would make the set dead is if you have a bad main board, if your able to pull the back off and test the either 3.5 or 5 volt standby voltage if its ok then look at the PSON voltage, it should be at a half volt and go to about 3.5 when the power button is pushed..if you don't have standby you have a bad power board yet, if you have standby but no PSON the main board is bad, if you have PSON its back to the PS as being bad...Good luck!!

Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary. Before going further; try a hard reset first. If it does not help you, replace the main digital board. There are two methods to reset TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight is better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; visit the site linked here.

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. http://electro-medical.blogspot.com/ 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 board.

These 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. Viewing it in "Mosaic" or "Magazine" will make surf easy. http://electronicshelponline.blogspot.com/ Blinking codes details to many popular brand TVs are given. Surf the site with patience. Do a search by type in the brand name of the device to the search box.

find and push the "reset button"

PROCEDURE:

(1) With Plasma turned On, Enter the I2C Service Menu: (Remember, you are doing this without seeing a picture).

• Press "EXIT" once, just in case TV Guide is brought up for Set-Up.
  

• Press "Menu" and wait a few seconds.
  

• Press "Menu" ~ "Menu" ~ "8" ~ "Select" Buttons on the Remote:
  

  • CLU-4371A, CLU-4372A, CLU-4373A, CLU-4374A or CLU-4371UG2.
    

• The Service Menu is entered, even though you can not tell.
  

Service Menu selection you can not see

• To navigate and adjust while in the Service Menu, use the remote control's Cursor Keys.
  

There is probably an overscan option in the TV menu. Make sure that is off. Otherwise, adjust the resolution on the computer to fit correctly.

does your plug have a reset on it?