Hi guys i have a LCD42761F acoustic solutions tv had it off a family member when i turn it on it just gives me the blue standby light. I have checked the caps on the power board and all looks fine. I just cant pin point what the problem is.
-
-
Re: LCD42761F acoustic solutions tv
Pictures of the boards please.Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !
https://www.facebook.com/Telford-Tel...7894576335359/ -
Re: LCD42761F acoustic solutions tv
Here is a picture of the power board sorry about the quality of the photo.
Comment
-
Re: LCD42761F acoustic solutions tv
need clearer pictures please tvmad1
good light and in focus thank youComment
-
Re: LCD42761F acoustic solutions tv
Check the poly caps and the diodes i have circled in red.
What voltage do you get across the main cap ?Attached FilesComment
-
-
Re: LCD42761F acoustic solutions tv
That's a vestel based unit, I had one in a technical model with main board fault that wasn't switching the psu on, never did narrow down the exact fault but replacement main cured it, be sure to check all psu voltages are coming up first though, there are schematics available onlineComment
-
Re: LCD42761F acoustic solutions tv
Checked for failed caps ?Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !
https://www.facebook.com/Telford-Tel...7894576335359/Comment
-
This is my first attempt at troubleshooting a board like this, I know I could just buy a new board but I'm curious to figure out how this works. I've been testing different components in the evenings this week and I think the problem is with the IC failing to start up for some reason. When the board is plugged in there is no standby voltage.
Then today it randomly sprung to life like a zombie but shortly died thereafter. I have no idea why it would have done that and its the first time I've seen it running. I discharged capacitors on the board last night, then it was sitting today.... -
ok will start from beginning .
when this tv came to me a few months back it had bad capacitors on the power board so changed them . then it was working fine .standby light on after plugging in . off when powered up tested tv for a few hours and was fine . fast forewords to weekend just gone .got tv out to sell it tested it and working fine .sold it and delivered it .tv apparently worked fine for first day then it switched itself off and apparently wouldn't switch on . brought it back here plugged in no standby light . pressed on on remote and tv came on fine and has been on for about 5 hours... -
Hi. I got a Vizio with no power or standby, and won't turn on with remote or button. I checked the voltages on the connector and all read 0.00V or nearly 0(0.050 ON/OFF pin). None of the pins are labeled STB for standby although I do see some 5V pins. Other than the obvious standby led, which isn't coming on, is there a way to check for standby voltage on this PS. I'm trying to see if my problem is the PS or mainboard. Some Vizios I have fixed with no standby led me to think it was the PS but it turned out being the mainboard. Any experience with this set would be greatly appreciated. -
Hi all.
I started a thread while back regarding TV power supply standby circuitry as it is something I am not quite on top of.
SMPS theory and function is becoming more familiar, however the standby part is still a bit of a mystery.
Anyway, a friend has this TV with the above mentioned power supply board which has no standby voltage, nor any other voltages leaving the board.
The mains AC comes in fine, gets filtered and rectified with power is on the main filter cap as well as the transformer and drain pins of the ICE3B0665J, but that's it.
... -
Hello forum. I've recently been given a Yamaha TSX 120 DAB radio and ipod dock. Its working well however when put on standby its using 6.3 watts. The manual states less than 1 watt on standby. I measured this with a plug in monitor which seems accurate with other items. In use it uses around 7.5 watts. Firstly has anyone who owns a similar radio also got a plug in monitor to check if this is normal with this unit? In the first half a second the monitor shows 0.3 watts which I suspect is what it should use but something is switching it to be almost fully powered. I've searched the manual for eco...03-01-2024, 07:25 AM
Comment