Toshiba 42hp82 plasma picture problem

Well this could the problem with g board because the sound is working and tv button is working when it is removed ,however if you want a solid answer for your question then you need a service manual to guide you to trouble shoot the problem ,I would recommend going to the following link and getting the service manual so testing procedures. Its only 10.99 and they email it to you shortly after purchase. The manual is a valuable resource as it will have part numbers in case you do need a new board. heres the link.
http://servicemanuals.vstore.ca/


Good luck....

Resetting the TV

Some TVs have a reset button. If available and accessible, try using the reset buttons before using the steps below. Using the reset buttons can saved time.
1. Unplug the TV power cord from the power outlet for 3 - 4 hours.
2. Unplug any connected devices (DVD, Set-top boxes, etc...)
3. Press and hold the TV power button for five seconds.
4. Plug the TV power cord back into the power outlet and turn on the TV.
5. Open the on-screen menu to confirm that the TV is responding again.
6. Turn off the TV and reconnect the devices.
7. Turn on the TV.

hope this may help;

Regards,
VOTIT

Sounds like your video signal is getting canned somewhere, without anosciloscope to do some test, hard to diagnose exactly what is going on. This is from esteemed FixYa colleaugue premtech on the g Hyper board This is a somewhat common problem having to do with the hyper module, Toshiba p/n#23148024
There are a gouping of 16v/10uf caps in the hyper board that fail causing the distoritions you're describing here. At first, as the module begins to go bad the distoritions are present and usuallly go away or fade significantly as the set warms up - - this gets worse until the distoritions don't go away at all... From what you're saying you're at stage three already. :)
You have a few of options: (1) local repair shop pull the board and replace the caps or module; (2) Pull the module yourself and repair or send it in for board level repair; or (3) pull the hyper baord, order a new one and put it in yourself.
For 2 or 3 you'll be better off having the service manual and if you need it just email me privately and I'll send it. Make sure in your request to tell me the model number and reference something of this repair so I have a clue of what you need.
BTW the hyper board is on the left side of the unit mounted vertical on the signal board inside a metal can.
Good Luck
Bill
Comment by premtech, posted on Jun 10, 2007 Sent link to service manual and schematics to your [email protected] address via Pando.. You will need to download Pando to retrieve them - Pando is free and most techs use it for sending large multiple files, up to 1 gig free...
Good Luck
Bill

It is possible to set brightness up to 550 cd/m 2. Users can useoptional side mounted speaker panel with this unit which can be removedeasily. It uses High Definition component video to show high qualitypictures on your screen. The unit is designed with distinct dimensionsas 41.5 x 25.5 x 3.5. With the help of On Screen Display menu, you canview various languages on the screen. It has totally 4 pictureexpansion modes which enables the user to view images in the fullscreen. If in need it is possible to view in distinct wide screen movieformats.
Users can adjust the colour settings by using colour temperaturecontrol option. To get optimum white balance, you can use 3 userselectable colour settings so that you can enjoy high quality displaywhile you watching programs. Toshiba Plasma Televisionhas embedded with 2 audio amplifiers. The amplifiers are used toamplify the sound effects. Each amplifier has the potential to offer 7watts audio output. It also featured with optional 3 way speakers.
http://tacpservice.toshiba.com/ConsumerProductSupport/Manuals/TV/2002/42hp82_ownman.pdf

Check all the connections before you purchase anything.

ConVERGENCE board. not conveyance board , and no it's not nessessarily the convergence board.

snowy picture is most offten caused by poor signal input.

convergence is refference to the colorguns and how they converge on the grid pattern test.

and what does he mean by snowy , that doesn't tell me alot but it does suggest poor signal input.

I bet you defiantly its the conveyance board it controls all that and has the resistors on it and capacitors if there blown the tv will play up like this no matter what you will have to get it serviced have a real professional look at it

Hi,
Try this Part Store having low prices boards for your Toshiba TV with return policy.

Hi
How do I adjust the color decoder?
There are several issues here. Generally speaking, the Panasonic decoder seems to push blue a bit. The R-Y Axis Angle and B-Y Axis Gain in the service menu are used to correct this behavior.
There used to be a problem on some Panasonics with the Y/C delay on the S-video input. See the Quality Control section for more information.
How do I set the black level on a plasma?
You set the black level by adjusting the "Brightness" setting. You can use the same test pattern you would use for any other display. 
What is the buzzing problem? How do I know if I have it?
You'll know. It's loud. In one instance, it was reported as loud as 72dB just above the display. There will always be some audible hum (60 Hz) if you listen right next to the display. If it's irritating from 10' away, you probably have the problem.
The problem was with two capacitors used in the power supply. The power supply board can be swapped out by a service technician and should be covered under warranty.
thanku sir,,,,,,,,,,,,,,,,dont forget to rate me

Just check the 120k resistor on the video output module.. about the switch check the contact if it still functioning...

let me know

Hai,

Replace the g-hyper board and check the status it may works.

Thank You