Bush LCD37TV006HD inputs changing automatically

[zx81]

Hi Guys can you please help with this Bush LCD37TV006HD problem?

Pics attached.

The problem is it will keep switching channels/inputs or go into menus and raise the volume up and down all on its own without any buttons being pressed.

Here are the voltages:

BL_ON_OFF - 3.20v
PMW_DIM - 3.24v
+12VL - 11.83v
+5v Stby - 5.5v
+5v main -5.45v
styb - 4.74v

Thanks,


zx81.

[tom66]

Re: Bush LCD37TV006HD inputs changing automatically

Unplug button board and see if fault clears, could be stuck button.

[zx81]

Re: Bush LCD37TV006HD inputs changing automatically

Wow Tom fast reply must have been 60 sec after I posted

Will check button board right now.

Cheers.

[zx81]

Re: Bush LCD37TV006HD inputs changing automatically

Removed button board and if i give it a slight twist back and fro I see the set behaving in the same manner but even more directly related to the twisting. What do you reckon dry joints?


There are only buttons resistors and one cap on the board.

[tom66]

Re: Bush LCD37TV006HD inputs changing automatically

I've had a fault like this on a Bush made by proview like this set. In that case the strange "parallel port" connector between boards had come loose. It connects the main board to the chassis.

[zx81]

Re: Bush LCD37TV006HD inputs changing automatically

Just flushed out the switched with switch cleaner and so far the set seems to be behaving

Even when I twist the board the selection stays put. I'll run it for a few hours and keep an eye on it. So far so good.

Cheers Tom.