Badcaps.net Forum
Go Back   Badcaps Forums > Troubleshooting Hardware & Devices and Electronics Theory > Troubleshooting TVs and Video Sources
Register FAQ Calendar Search Today's Posts Mark Forums Read

 
Thread Tools Display Modes
Old 01-17-2022, 01:10 PM   #1
WhiteWolfHellas
Member
 
Join Date: Jun 2019
City & State: Athens
My Country: Greece
I'm a: Knowledge Seeker
Posts: 86
Default Toshiba 32AV933G stuck on stby

Hello, I have this TOSHIBA 32AV933G and it is stuck on standby LED (red). It doesn't turn on and the 12V is missing. Anyone has any experience with these PSUs and what to check? (DPS-140SP A)
WhiteWolfHellas is offline   Reply With Quote
Old 01-17-2022, 03:12 PM   #2
lotas
Badcaps Veteran
 
Join Date: Jan 2016
City & State: Sochi
My Country: russia
I'm a: Knowledge Seeker
Posts: 743
Default Re: Toshiba 32AV933G stuck on stby

Maybe the firmware has crashed.
Attached Files
File Type: pdf dps-140sp_132.pdf (136.1 KB, 10 views)
lotas is offline   Reply With Quote
Old 01-17-2022, 03:20 PM   #3
dskall
Badcaps Veteran
 
dskall's Avatar
 
Join Date: Oct 2016
City & State: Bakersfield ca.
My Country: usa
Line Voltage: 120VAC 60Hz
I'm a: Knowledge Seeker
Posts: 2,671
Default Re: Toshiba 32AV933G stuck on stby

Are you getting a change at your PS_on terminal?
__________________
I assume no responsibility for any stupid suggestions I might post.
dskall is online now   Reply With Quote
Old 01-18-2022, 02:31 AM   #4
WhiteWolfHellas
Member
 
Join Date: Jun 2019
City & State: Athens
My Country: Greece
I'm a: Knowledge Seeker
Posts: 86
Default Re: Toshiba 32AV933G stuck on stby

Quote:
Originally Posted by dskall View Post
Are you getting a change at your PS_on terminal?
Nope, 0,0V at PS_ON. Any other idea?
WhiteWolfHellas is offline   Reply With Quote
Old 01-18-2022, 02:33 AM   #5
WhiteWolfHellas
Member
 
Join Date: Jun 2019
City & State: Athens
My Country: Greece
I'm a: Knowledge Seeker
Posts: 86
Default Re: Toshiba 32AV933G stuck on stby

Quote:
Originally Posted by lotas View Post
Maybe the firmware has crashed.
I thought about this too. Do you think the 25Q64 needs programming?
WhiteWolfHellas is offline   Reply With Quote
Old 01-18-2022, 02:50 AM   #6
lotas
Badcaps Veteran
 
Join Date: Jan 2016
City & State: Sochi
My Country: russia
I'm a: Knowledge Seeker
Posts: 743
Default Re: Toshiba 32AV933G stuck on stby

Quote:
Originally Posted by WhiteWolfHellas View Post
I thought about this too. Do you think the 25Q64 needs programming?
What is your motherboard number and panel number?
lotas is offline   Reply With Quote
Old 01-18-2022, 02:53 AM   #7
yokoono
Badcaps Veteran
 
Join Date: Apr 2010
Posts: 307
Default Re: Toshiba 32AV933G stuck on stby

If you don't try you don't know. I think I wrote 993 wrong instead of 933.
Attached Files
File Type: rar Toshiba 32AV993G.rar (4.07 MB, 6 views)

Last edited by yokoono; 01-18-2022 at 02:59 AM..
yokoono is offline   Reply With Quote
Old 01-18-2022, 03:52 AM   #8
WhiteWolfHellas
Member
 
Join Date: Jun 2019
City & State: Athens
My Country: Greece
I'm a: Knowledge Seeker
Posts: 86
Default Re: Toshiba 32AV933G stuck on stby

Quote:
Originally Posted by lotas View Post
What is your motherboard number and panel number?
Panel: LTA320AP05
MB: 32AV933_MAIN BD 11580673-MB00309-60EB40M0KB02P
Attached Images
File Type: jpg IMG_20220118_112927.jpg (685.3 KB, 8 views)
WhiteWolfHellas is offline   Reply With Quote
Old 01-18-2022, 04:01 AM   #9
WhiteWolfHellas
Member
 
Join Date: Jun 2019
City & State: Athens
My Country: Greece
I'm a: Knowledge Seeker
Posts: 86
Default Re: Toshiba 32AV933G stuck on stby

Quote:
Originally Posted by dskall View Post
Are you getting a change at your PS_on terminal?
I just injected 3,3V with my bench PSU to PS_ON and 12V and 24V appeared, so my PSU is OK. The problem is the main board?
WhiteWolfHellas is offline   Reply With Quote
Old 01-18-2022, 04:20 AM   #10
lotas
Badcaps Veteran
 
Join Date: Jan 2016
City & State: Sochi
My Country: russia
I'm a: Knowledge Seeker
Posts: 743
Default Re: Toshiba 32AV933G stuck on stby

Quote:
Originally Posted by WhiteWolfHellas View Post
Panel: LTA320AP05
MB: 32AV933_MAIN BD 11580673-MB00309-60EB40M0KB02P
Try under your panel.
Attached Files
File Type: rar 32av933_32av933_lta320ap05.rar (4.06 MB, 6 views)
lotas is offline   Reply With Quote
Old 01-18-2022, 04:55 AM   #11
WhiteWolfHellas
Member
 
Join Date: Jun 2019
City & State: Athens
My Country: Greece
I'm a: Knowledge Seeker
Posts: 86
Default Re: Toshiba 32AV933G stuck on stby

Quote:
Originally Posted by lotas View Post
Try under your panel.
I just removed it, programmed it then resoldered it back to the main board, still the same unfortunately.
WhiteWolfHellas is offline   Reply With Quote
Old 01-18-2022, 05:09 AM   #12
lotas
Badcaps Veteran
 
Join Date: Jan 2016
City & State: Sochi
My Country: russia
I'm a: Knowledge Seeker
Posts: 743
Default Re: Toshiba 32AV933G stuck on stby

Check all the voltages on the motherboard inductors, maybe there is no voltage or the voltage on them is too low.
Attached Files
File Type: rar toshiba-32av933.rar (1.52 MB, 8 views)
lotas is offline   Reply With Quote
Old 01-18-2022, 10:25 AM   #13
dskall
Badcaps Veteran
 
dskall's Avatar
 
Join Date: Oct 2016
City & State: Bakersfield ca.
My Country: usa
Line Voltage: 120VAC 60Hz
I'm a: Knowledge Seeker
Posts: 2,671
Default Re: Toshiba 32AV933G stuck on stby

Check your power on and ir for voltage and change when you press buttons. Try heating up main chip and see if it comes on, BGA problem. 3.3v on pin8 of eeprom. 1.2v for processor core. Voltage at oscillator.

Last edited by dskall; 01-18-2022 at 10:50 AM..
dskall is online now   Reply With Quote
Old 01-18-2022, 10:36 AM   #14
nomoresonys
Badcaps Veteran
 
Join Date: Jan 2013
City & State: midwest
My Country: U.S.
I'm a: Knowledge Seeker
Posts: 7,702
Default Re: Toshiba 32AV933G stuck on stby

Did you check the solder joints on the powersupply?
__________________
(Signature) One of the first and least expensive things you can do when you have an issue is take the powerboard out of the tv, flip it over and look the solder joints over with a magnifying glass if needed, add a little flux to make the solder flow well and add solder to any joints that look even a little suspect. You can practice on a scrap pcb board if needed, careful not to bridge any joints, and always let the board sit for quite a while or discharge the big caps with an appropriate resister before working on it (safety first) to try to keep from getting shocked, it doesn't take 1000 volts to KILL, a lot less can kill, so be careful, it's only a tv.
nomoresonys is offline   Reply With Quote
Old 01-19-2022, 04:57 AM   #15
WhiteWolfHellas
Member
 
Join Date: Jun 2019
City & State: Athens
My Country: Greece
I'm a: Knowledge Seeker
Posts: 86
Default Re: Toshiba 32AV933G stuck on stby

Quote:
Originally Posted by dskall View Post
Check your power on and ir for voltage and change when you press buttons. Try heating up main chip and see if it comes on, BGA problem. 3.3v on pin8 of eeprom. 1.2v for processor core. Voltage at oscillator.
I see voltage change when I press buttons on the remote and there are 3,3V on pin 8 of eeprom.
WhiteWolfHellas is offline   Reply With Quote
Old 01-19-2022, 04:58 AM   #16
WhiteWolfHellas
Member
 
Join Date: Jun 2019
City & State: Athens
My Country: Greece
I'm a: Knowledge Seeker
Posts: 86
Default Re: Toshiba 32AV933G stuck on stby

Quote:
Originally Posted by nomoresonys View Post
Did you check the solder joints on the powersupply?
PSU was checked for cold solder joints, nothing suspicious.
WhiteWolfHellas is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



Badcaps.net Technical Forums 2003 - 2022
Powered by vBulletin ®
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 04:35 PM.
Did you find this forum helpful?