Toshiba 42rv530u picture problem

[kueberco]

I finally got this unit to display a picture. I bought a used main board from an auction site. I've checked all power supply voltages and found them to be correct. I've also tried a different T-con board, But the picture still looks like this. I'm still thinking the main board is at fault. The picture also has a mirror effect, Like its taking the bottom of the screen and inverting it to the top. I would like to know what commonly fails on the mainboard and replace that particular component . Any help or ideas would be greatly appreciated.

[tom66]

Re: Toshiba 42rv530u picture problem

Do you have a bigger picture of the problem? It looks like a failed memory IC, does it affect the OSD/interface too?

If the board you bought wasn't taken from the same model, or the model it was taken from used a different LCD panel, it's possible it needs to be reconfigured using the service menu, if available.

[selldoor]

Re: Toshiba 42rv530u picture problem

Not sure why you have started a new thread? - we are still going to need
decent pictures of the main board front and back and a close up of the
eeprom so tom can point out the pins to short to reset it.

[kueberco]

Re: Toshiba 42rv530u picture problem

All inputs do the same thing. The menu displays funny as well. When I checked the firmware version it said - 4.2.40.0. Xv540u 4-7-2008. Is that model listed the problem? How would I reconfigure it? Thanks for the help!

[kueberco]

Re: Toshiba 42rv530u picture problem

Do you have a bigger picture of the problem? It looks like a failed memory IC, does it affect the OSD/interface too?

If the board you bought wasn't taken from the same model, or the model it was taken from used a different LCD panel, it's possible it needs to be reconfigured using the service menu, if available.

The original picture I took was to large to upload. I have no program to reduce the pixels. I've also tried reseating the ribbon cables as well.

[tom66]

Re: Toshiba 42rv530u picture problem

That model number certainly could be causing the problem.

To enter service mode:

Set volume using RC to zero.
Press MUTE twice then release it.
Hold MUTE down.
While holding MUTE press MENU.

Important information from manual - probably relevant to your problem: "Whenever using new MAIN PC board to the set, set the SET-ID data according to panel option data."

Manual is here:

Wait 60 seconds for Get Manual link to appear.

[kueberco]

Re: Toshiba 42rv530u picture problem

That model number certainly could be causing the problem.

To enter service mode:

Set volume using RC to zero.
Press MUTE twice then release it.
Hold MUTE down.
While holding MUTE press MENU.

Important information from manual - probably relevant to your problem: "Whenever using new MAIN PC board to the set, set the SET-ID data according to panel option data."

Manual is here:

Wait 60 seconds for Get Manual link to appear.

Going into the service mode rendered my original mainboard useless, I mistakingly changed a setting in there and it the set would not turn on. I need to be absolutley sure what to change in there next time. Can you give a little more detail on what to do in that menu? Thanks.

[tom66]

Re: Toshiba 42rv530u picture problem

Going into the service mode rendered my original mainboard useless, I mistakingly changed a setting in there and it the set would not turn on. I need to be absolutley sure what to change in there next time. Can you give a little more detail on what to do in that menu? Thanks.

The service manual is your best bet.

[kueberco]

Re: Toshiba 42rv530u picture problem

Reloaded pic

[kueberco]

Re: Toshiba 42rv530u picture problem

Anyone have a good reliable source for toshiba mainboards that work when installed? Thanks!

[tom66]

Re: Toshiba 42rv530u picture problem

Anyone have a good reliable source for toshiba mainboards that work when installed? Thanks!

Did the reseller state it was compatible with your model? If so, you should be entitled to a refund because clearly it isn't.

[kueberco]

Re: Toshiba 42rv530u picture problem

Do you have a bigger picture of the problem? It looks like a failed memory IC, does it affect the OSD/interface too?

If the board you bought wasn't taken from the same model, or the model it was taken from used a different LCD panel, it's possible it needs to be reconfigured using the service menu, if available.

Here's a better pic

[kueberco]

Re: Toshiba 42rv530u picture problem

Did the reseller state it was compatible with your model? If so, you should be entitled to a refund because clearly it isn't.

Yes, They say they will refund. Is finding a replacement at a reasonable price going to be a hassle? Thats why I'm trying to learn about component replacement for this particular board. Seems all the available boards are refurb or rebuilt, So that leads me to believe that components are available to correct the fault. Thanks Tom66

[kueberco]

Re: Toshiba 42rv530u picture problem

Not sure why you have started a new thread? - we are still going to need
decent pictures of the main board front and back and a close up of the
eeprom so tom can point out the pins to short to reset it.

There seems to be four EEPROM chips on the back of the board. 24c02wp is the number on them.

[kueberco]

Re: Toshiba 42rv530u picture problem

That model number certainly could be causing the problem.

To enter service mode:

Set volume using RC to zero.
Press MUTE twice then release it.
Hold MUTE down.
While holding MUTE press MENU.

Important information from manual - probably relevant to your problem: "Whenever using new MAIN PC board to the set, set the SET-ID data according to panel option data."

Manual is here:

Wait 60 seconds for Get Manual link to appear.

Thanks Tom66! I followed the service manual to get the parameters set. The tv came to life for about fifteen minutes then started to do funny things again. The picture is no longer fuzzy though. Still getting the inverted image. I checked voltages on the power supply, They are all correct while unit is powered up. Any idea what component may be failing on the main board?

[tom66]

Re: Toshiba 42rv530u picture problem

Thanks Tom66! I followed the service manual to get the parameters set. The tv came to life for about fifteen minutes then started to do funny things again. The picture is no longer fuzzy though. Still getting the inverted image. I checked voltages on the power supply, They are all correct while unit is powered up. Any idea what component may be failing on the main board?

Did you get the inverted image when it was briefly working?

[selldoor]

Re: Toshiba 42rv530u picture problem

Have you tried with other sources - PC/ DVD - what source are you using.

[kueberco]

Re: Toshiba 42rv530u picture problem

Did you get the inverted image when it was briefly working?

No. Picture was perfect for about twenty minutes.

[kueberco]

Re: Toshiba 42rv530u picture problem

Have you tried with other sources - PC/ DVD - what source are you using.

Tv and component inputs reveal same picture.

[kueberco]

Re: Toshiba 42rv530u picture problem

Thanks Tom66! I followed the service manual to get the parameters set. The tv came to life for about fifteen minutes then started to do funny things again. The picture is no longer fuzzy though. Still getting the inverted image. I checked voltages on the power supply, They are all correct while unit is powered up. Any idea what component may be failing on the main board?

Reloaded pics