Top 20 Hisense TA42P40M 42 in. Plasma Television - Page 8 Questions & Answers

Why do you need up update firmware?

Unfortunately, you're getting a lot of bad and not helpful information like replace capacitors, power supply ect without doing any testing to determine what the actual issue is. Where you need to start is by testing the main board to see if it's doing what it's supposed to do to "wake up" the power supply. Put your multimeter ground lead on the frame ground and find the terminal marked PS_On on the connector going from the power to main board (there will be a legond on the board to tell what pin is what) once you have your meter hooked to that connector turn the TV on and see if you see around 3.3 VDC, this is the signal that tells the power supply to turn on. If you don't see that voltage replace the main board if you see it you need to do some testing of the power board to see if its working, I'm going to have you run this test before going any farther.

EN-83801 is the part number of a Sharp remote control, is that what you have that doesn't work?

Probably not. The mask on the processor will be different.

Let me get this right..you want to know where the EEPROM is located on the main board, then you want to short some pins but not sure what pins to short so the TV will magically reboot. You said something about "get it out of the boot loop"..The boot log is what you need for the TV to work, The ROM sends the various commands to the CPU telling it what to do to make the TV wake up and come on. For your set to work you need to REPLACE the IC, ld tell you where it's located at but I doubt you have the equipment to replace SMD components. Your best bet to fix the TV is replace the main board.

Hi Drew..Your backlights are bad, common issue, there are some shorted diodes in the lamp strips, the over current section of the inverter is shutting down, then the set reboots, senses over current and shuts down again ect

Sounds like a backlight issue

Question edited for 'make model (what it is)'. Question moved from Computers and Internet category to Hisense Television. Check the power to the LEDs. Power the LEDs remotely and decide if the fault is the power supply or the LEDs. Or just buy both from Shop Jimmy and hope for the best. But this might happen :>( https://www.fixya.com/support/r29790007-repairing_own_television ..

Hi try to use a power module if you can (it's a risky situation "high voltage" or get a qualified personel) on the power issue turn it to 5 volts up to 7 volts while checking the functionality.

Your backlights are bad, common failure

Question edited for clarity. This is usually how it goes and Hisense is a bargain basement brand anyway. https://www.fixya.com/support/r29790007-repairing_own_television ..

if plug into 220 start saving for a new one you will burn it up

See the video, Contact Customer Support and they send the Firmware Update on a USB Memory Stick. https://www.youtube.com/watch?v=of_AT2LSriQ ..

Chances are your LED backlights have failed and need replacing

Most likely you have a main board issue, this model set had a really high failure rate for the main board and for that reason finding one is not easy and if you find one plan on spending around ($100) on a replacement board. What gives issues is the EEPROM gets corrupt data stored in it and it doesn't send the boot sequence to the CPU to power the set up, without that information the set can't come on. You can order a new IC from shopjimmy.com for around $15.00 but installing it isn't something most can do as it takes advanced soldering skills as it's a SMD but if you have the equipment and are ok changing it it's a cheap fix...The part location is N10 if that helps. Good luck

If your Hisense TV won't turn on, first ensure that the power cord is correctly seated in the back of your TV and then try a different wall outlet. If the TV still doesn't turn on, unplug it from the wall, wait 60 seconds, then plug it back in.

One of the boards has failed. If you try and fix it yourself, this will happen. :>D https://www.fixya.com/support/r29790007-repairing_own_television ..

Your EEPROM has corrupt data, easy way to fix is replace the main board unless your good at soldering SMD devices, the IC can be bought and soldered in for about $10 but it's not something most can do

Backlight issues, but why, the LEDs or the power to them. Get out all your test equipment, or have a read of this; https://www.fixya.com/support/r29790007-repairing_own_television ..