toshiba 26hlv66 help?

[mattstolte]

ok so I got sound but no picture, so im thinking its main board, thought at first tcon but replaced that and same issue with screen, so but im not sure which is main board on this tv? is it the one with inputs on it? or the one text to tuner board with metal thing on it? if not what else could be problem?[/ATTACH]

[mattstolte]

Re: toshiba 26hlv66 help?

Anybody?

[tom66]

Re: toshiba 26hlv66 help?

In the photo uploaded, it looks like a shield has been removed. The T-con is under there. Most likely it is a T-con fault, the fuse is a common problem.

[mattstolte]

Re: toshiba 26hlv66 help?

In the photo uploaded, it looks like a shield has been removed. The T-con is under there. Most likely it is a T-con fault, the fuse is a common problem.

I already changed the tcon today and same thing... so I'm thinkn it is the main board.. but with all these old lcds I'm not sure which is the main?

[audiofreak19]

Re: toshiba 26hlv66 help?

Your main board is the one with the av inputs on it.

[tom66]

Re: toshiba 26hlv66 help?

How sure are you the new t-con is working? It's best to test it, if it is a part from a recycled TV.

[mattstolte]

Re: toshiba 26hlv66 help?

so I have changed tcon and main board on two separate occasions and still no change, im not familiar with old lcds, now im starting to wonder what about the board the lvds from tcon goes it? what is that and could it be bad?

[tom66]

Re: toshiba 26hlv66 help?

That is part of the LCD panel.

[mattstolte]

Re: toshiba 26hlv66 help?

That is part of the LCD panel.

Tom no I'm talking apart the part of the cable that goes in the bottom of tcon, I'm wondering about the board the other end connects to? What's that? And could it be the problem?

[tom66]

Re: toshiba 26hlv66 help?

Can we have a picture of this board..? Not sure really.

[mattstolte]

Re: toshiba 26hlv66 help?

Can we have a picture of this board..? Not sure really.

tom is the board that the lvds cable from tcon is going to. what is that and could that be my problem? im not familiar with these old lcds

[tom66]

Re: toshiba 26hlv66 help?

I suspect that's a digital video processing board of some kind.

Have you checked for 12V at both ends of the fuse on both T-con boards?

[mattstolte]

Re: toshiba 26hlv66 help?

I suspect that's a digital video processing board of some kind.

Have you checked for 12V at both ends of the fuse on both T-con boards?

so tom you want me to check this little white fuse right? I checked it in diode mode and it reads 002 both ways, how do I check it for 12 volts? and in tv and on? and where to put probes?

[martino]

Re: toshiba 26hlv66 help?

If T-con board is OUT of TV or TV is OFF,put DMM on ohm(where DMM beeps when probes connect) and put probes on either side of fuse(yes,F1)
If DMM beeps,fuse is ok.

If T-con board is IN the TV,put DMM on 20volts DC,put black probe on chassis,and with red probe measure both sides of F1 with Tv turned ON..
If you see 12v on both sides on F1,then fuse is ok.

[mattstolte]

Re: toshiba 26hlv66 help?

If T-con board is OUT of TV or TV is OFF,put DMM on ohm(where DMM beeps when probes connect) and put probes on either side of fuse(yes,F1)
If DMM beeps,fuse is ok.

If T-con board is IN the TV,put DMM on 20volts DC,put black probe on chassis,and with red probe measure both sides of F1 with Tv turned ON..
If you see 12v on both sides on F1,then fuse is ok.

Tcon is good, so I replaced tcon and same thing then replaced main board and same thing

[mattstolte]

Re: toshiba 26hlv66 help?

Anybody?

[tom66]

Re: toshiba 26hlv66 help?

How sure are you about the t-con being good? You are aware most sellers don't test their boards, right? Did you do the voltage check as martino says?

[mattstolte]

Re: toshiba 26hlv66 help?

Yes fuse test good on tcon