M3D421SR main board replacement

[twoj]

I can not find a new mainboard for this TV, its # is: TXBCB2K00603Q.

Does anyone know its 'brother': #TXBCB2K00605Q would give me a problem?

Thanks

[splitcrete]

Re: M3D421SR main board replacement

Google the part number...

[twoj]

Re: M3D421SR main board replacement

Google the part number...

I did, but I can not get a confirmation that this other part (5Q) will be exact replacement for (3Q). I received conflicting reports, one seller said that they are not compatible and another said that they will be fine.

TXBCB2K00605Q is listed as a part that goes into M3D421SR, I'm just looking for some clarification (since Vizio does not provide any) from the field to make sure this will work.

Thanks

[Moreno83]

Re: M3D421SR main board replacement

A quick search on Ebay and i found that the boards below are for the M3D421SR model…..

CBPFTXBC2K00601Q
CBPFTXBC2K00602Q
CBPFTXBC2K00603Q
CBPFTXBC2K00604Q

Did you compare them visually? It could be that 1 model is used for example a different country?

[twoj]

Re: M3D421SR main board replacement

I do not have the new 5Q board yet. So no visual comparison is possible yet.

I looked all over, and no-one has a new 3Q in stock (but that one post on ebay #321476068404, board is 'used').
I was also unable to find any further reference to the different flavors of the TXBCB2K0060XX. One seller said that as long as the the first set of number is: CBPFTXBC2K006 it should work, however another said that it will not.

I ended up ordering a 'new' 5Q board, well see how it works when I get it. Trial by fire! :-)

But, if anyone has any explanation to what these number signify, that would be great!

Regards

[Moreno83]

Re: M3D421SR main board replacement

Its not a problem that the board is used? Im thinking that these boards have minor differences.
You could have googled for images of the 5Q board and compare it to yours

good luck and let me know if the board works or not.

[twoj]

Re: M3D421SR main board replacement

From what I saw in the pics, I could not find any differences. Maybe I missed something.
I was hoping to find manufacturer's x-ref sheet, but I think I may be dreaming here.

I will definitely post back as to how it goes. It may help out the next guy.

[twoj]

Re: M3D421SR main board replacement

Here are my 2 board, I can not see any differences to my untrained eyes.

Anybody care to take a quick peek?

[twoj]

Re: M3D421SR main board replacement

OK! I got the new board and I replaced it.

IT WORKED! :-)

Thank you and good luck! If anyone is interested in my old CBPFTXBC2K00603Q let me know.

[tvquestions]

Re: M3D421SR main board replacement

Hey, I see that you replaced your main board with the 5Q. Is it still in working order?

[twoj]

Re: M3D421SR main board replacement

Working Great!

No problems at all! Got lucky this time.

[ecking767]

Re: M3D421SR main board replacement

This fix can help some with bad firmware, I can't find any information on the other board part number matching or being compatible with the M3D421SR

http://www.ernestos-electronics.com/...re-update-fix/

[twoj]

Re: M3D421SR main board replacement

ecking767, this fix might work if your board is semi-fried; however my was partially working.
TV was functional, with the exception of HDMI signal inputs. All other inputs worked, including VIZO apps.

[ecking767]

Re: M3D421SR main board replacement

ecking767, this fix might work if your board is semi-fried; however my was partially working.
TV was functional, with the exception of HDMI signal inputs. All other inputs worked, including VIZO apps.

You will be surprise on how a bad Firmware can effect a main board. not just stuck on logo or not powering on problem. other problem like no picture and missing HDMI ports. Its a very importance part on a main board

[twoj]

Re: M3D421SR main board replacement

So the firmware on these can get corrupted?

Have you ever seen it corrupt the HDMI inputs only?

[tvquestions]

Re: M3D421SR main board replacement

twoj, Thank you! I am trying to find the 5Q online and can't seem to find it. Could you tell me where you ordered yours from?

[twoj]

Re: M3D421SR main board replacement

I go mine on ebay. Seller was: usblu_ray626

Contact him to see if has any more.
OR try to reflash the firmware @ $35 seems reasonable.

BTW, what is the problem with your TV?

[tvquestions]

Re: M3D421SR main board replacement

Black screen. Won't turn on, but Vizio logo lights up when connected to a power source. I took it to the repairman, but he can find the part (main board) anywhere, so I thought I'd offer to help look (that way I wouldn't be charged markup on the part as well.

[twoj]

Re: M3D421SR main board replacement

I'd try ecking767 fix above... for $35 you can not beat it... I do not know enough to say it will/will not work, but $35 is a small price to find out.

Keep looking on ebay, and I would try other number as well 3,4,5,6 in the series...