toshiba regza no picture
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Re: toshiba regza no picture
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Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: toshiba regza no picture
Yep spot on,
For PC
Install Zeus ,right click on the HTML ,file open with Internet Explorer ,
Allow Active X Control ......job done,If it still don,t open IE's security level is to high... lower it !
Hope the following clears a few mysteries up
Got another board for my 37"........Board is marked 32,Vendor said it was from a 37...wrong.
(sticker in one corner)
Similar result as the pics above, except worse .....mines definately been on acid !!
Wuhow trippy
Using the manual config guide...bloody confusing ,and i am not new to this..
And hours of trying to program my 32 board with the correct codes,
In the service mode selected 37av555 (LG screen)
Displays all settings correctly,save by switching off and .......
Yes back to 32AV555 settings ..arrgg
Then swapped the dead board 37 eprom to the working (sort off) 32 board
SAME result...it loaded up the 32" settings.......????
Conclusion 1
the main config settings are not stored in that eprom,(ic151)
It only stores user settings.
Conclusion 2
You cannot swap 32,37,OR 42 ,boards..they are flashed on manufacture,(that maybe stored into an onchip flash rom on the micro).
Note the white sticker on the board 32 or 37
Just bought a cracked screen 37 on ebay for £40..
Cant be arsed to spend anymore valuable time on this one !!Comment
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Re: toshiba regza no picture
I have a post somewhere tells you how to do this but I dont think it will work for your problem. It is usually done where the data on the has become corrupt
and it wipes it . The data is also held on a non writable chip which then loads back onto the eeprom. (At least thats what I think - no doubt someone will correct me if wrong)
In this case all that would happen is that it would re-write what it already has it would not change from 37 to 32. Anyway it always seems risky you could brick it.
After you did the changes did you do the key "9" selftests.
Also have you unplugged or switched off at mains then on again so that it reboots? after making the changes.
You would think there was someone on the forum who had changed screen size in the service menu??? How about a separate post asking just that. ( not that I am usually in favour of separate posts) Not everyone will be following this thread but they might have done it on a vizio as some of those boards seem interchangeble.
You could head it up "Main board swap - change screen size in service menu???"and say what you have done so far.Please upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740Comment
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Re: toshiba regza no picture
I have done all of the above !
If you study the schematic there is a toshiba service socket on the PCB,
With only a couple of pins connected ,USB data a+b +gnd,
This is where the firmware is flashed (I think ?)
But that would need the propriatry toshiba software and (bin)files.
I worked for a tosh CRT TV service dept about 10 years ago and there were loads of grumbles then about people playing with service menus ,
Rendering their sets useless !!
I think they have locked that down so non Tosh techs cant play with the config,
And have long lost any contact with fellow techs I worked with.
Make a worker telly from two different screen size doners !...Clever Toshiba says no!!
Anyway I tried every thing i know to get the board to save the configuration.
And no joy even though you could test the screen modes as per manual,
Another 37 arriving tommorow so i will post back how the (new) boards
test out !Last edited by S2udio; 04-23-2012, 10:17 AM.Most of the time things ain't what they seem to beComment
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Re: toshiba regza no picture
I have done all of the above !
If you study the schematic there is a toshiba service socket on the PCB,
With only a couple of pins connected ,USB data a+b +gnd,
This is where the firmware is flashed (I think ?)
But that would need the propriatry toshiba software and (bin)files.
I worked for a tosh CRT TV service dept about 10 years ago and there were loads of grumbles then about people playing with service menus ,
Rendering their sets useless !!
I think they have locked that down so non Tosh techs cant play with the config,
And have long lost any contact with fellow techs I worked with.
Make a worker telly from two different screen size doners !...Clever Toshiba says no!!
Anyway I tried every thing i know to get the board to save the configuration.
And no joy even though you could test the screen modes as per manual,
Another 37 arriving tommorow so i will post back how the (new) boards
test out !Attached FilesComment
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Re: toshiba regza no picture
I have done all of the above !
If you study the schematic there is a toshiba service socket on the PCB,
With only a couple of pins connected ,USB data a+b +gnd,
This is where the firmware is flashed (I think ?)
But that would need the propriatry toshiba software and (bin)files.
I worked for a tosh CRT TV service dept about 10 years ago and there were loads of grumbles then about people playing with service menus ,
Rendering their sets useless !!
I think they have locked that down so non Tosh techs cant play with the config,
And have long lost any contact with fellow techs I worked with.
Make a worker telly from two different screen size doners !...Clever Toshiba says no!!
Anyway I tried every thing i know to get the board to save the configuration.
And no joy even though you could test the screen modes as per manual,
Another 37 arriving tommorow so i will post back how the (new) boards
test out !Comment
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Re: toshiba regza no picture
Well yes ..and no
Not expecting much.......
The 37 I got off ebay for £40 turned up, reportedly working with no image and shading in ,
One corner of the screen....Powered it up and...it works fine ! ?
(jammy bugger)
No evidence of the reported fault ,although after a few hours of use.
The sound has slight odd low freq rumblings...and the PSU noise increases
In comparison to a cold start.......Badcaps are Suspected !
Not taken the back off yet to have a swap fest ,to test what good/bad,
Boards i have in total
At least I now have a worker and if lucky can do some AV board tests to
find the original AV board non return psu signal power problem.
Busy with other stuff at the mo so will have to wait for a play.Last edited by S2udio; 04-28-2012, 05:14 AM.Most of the time things ain't what they seem to beComment
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Re: toshiba regza no picture
Well yes ..and no
Not expecting much.......
The 37 I got off ebay for £40 turned up, reportedly working with no image and shading in ,
One corner of the screen....Powered it up and...it works fine ! ?
(jammy bugger)
No evidence of the reported fault ,although after a few hours of use.
The sound has slight odd low freq rumblings...and the PSU noise increases
In comparison to a cold start.......Badcaps are Suspected !
Not taken the back off yet to have a swap fest ,to test what good/bad,
Boards i have in total
At least I now have a worker and if lucky can do some AV board tests to
find the original AV board non return psu signal power problem.
Busy with other stuff at the mo so will have to wait for a play.Comment
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Most of the time things ain't what they seem to beComment
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Re: toshiba regza no picture
S2udio if you require any parts for your 37" let us know as its just sat in shed..screens no good & no main board..Comment
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Re: toshiba regza no picture
Got hold of a 37av55d model with smashed screen for 25quid cos the mainboards are the same..fitted board into 32" and the picture comes on but its not right..i can only discribe it like in the film predator the different visions the alien has..theres nowt loose so i dont know what to try..the only way to nearly have a good picture is to turn the contrast to 0 & thats in every mode ie dynamic/movie etc..
Sorry to drag this from the depths guys but if anybody has this problem after replacing a main board in an AV555 or similar (with a board from a different size) drop me a message.
I've fixed more of these Toshiba Regza's than I care to mention and, more importantly, I have a Kel Tool! Bought it for a tenner from someone who didn't know what they had. Recently I bought a 32AV555 for 25 quid because it had a 42AV555 main board in it. I pulled out my Kel Tool and my pen drive then - two days later - sold it for 150. I don't mean to brag, but owning a Kel Tool is like holding the key to the pearly gatesComment
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Re: toshiba regza no picture
HI all
Got an issue with mine but very different. It work but only with many lines as if someone hit it very hard but after few minutes (15-40mins) the lines go away and the tv works perfectly. Anyone knows why?Full-time computer repair tech (10am - 6pm) and full-time, (8am - 11pm), Ruby on Rails DeveloperComment
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Re: toshiba regza no picture
https://www.badcaps.net/forum/showth...898#post561898
Eprom swap...maybe it`s useful.Comment
Related Topics
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by jord4231Hi Everyone,
I'm working on a Toshiba 37AV500A Regza TV.
The issue:
TV was working picture and sound went out. Green stand by light stayed on, It will respond to the power button being pressed (goes in and out of standby)
The TV will very intermittently work for around 40 mins then stop. This doesn't seem to matter if its hot/cold unplugged for a while etc.
I checked the PSU voltages and everything looked good.
No bulging caps or signs of heat.
24v aud = 24.41v
12v = 11.98v
5v = 5.062
p_o/f = Goes high... -
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