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Crumbtrail TV Forums: TV Equipment: TV Repair Forum:
Toshiba Regza 37x3030DB Sound but no Picture

 
 


All Mod Cons
New User

Sep 17, 2011, 6:04 PM

Post #1 of 16 (13935 views)
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Toshiba Regza 37x3030DB Sound but no Picture Can't Post
Hi There,
My Toshiba Regza 37x3030DV will not show a picture. The sound is fine but nothing is displayed on the screen. Occasionally I see 'DTV' flash up for a second in the top left hand corner but then nothing. I've tried all the controls but all I get is sound.
Any ideas what could be wrong and what I can do to fix it?
Thanks, Richard.



sweetguy67
New User

Sep 17, 2011, 6:28 PM

Post #2 of 16 (13932 views)
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Re: [All Mod Cons] Toshiba Regza 37x3030DB Sound but no Picture [In reply to] Can't Post
what type of set do you have ,lcd or plasma,.


All Mod Cons
New User

Sep 17, 2011, 6:33 PM

Post #3 of 16 (13931 views)
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Re: [sweetguy67] Toshiba Regza 37x3030DB Sound but no Picture [In reply to] Can't Post
It's an LCD TV. I just tried it again. It shows 'DVT' in the top with a slight blue background on the screen for a split second, then the screen goes black.


sweetguy67
New User

Sep 17, 2011, 6:52 PM

Post #4 of 16 (13928 views)
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Re: [All Mod Cons] Toshiba Regza 37x3030DB Sound but no Picture [In reply to] Can't Post
ok, that now sounds like the t-con board, but first check your inverter boards to see if they are ok,,. look for any burnt spots, and buffed caps,.


jts1957
Veteran


Sep 18, 2011, 12:45 AM

Post #5 of 16 (13923 views)
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Re: [sweetguy67] Toshiba Regza 37x3030DB Sound but no Picture [In reply to] Can't Post
BUFFED LIKE THIS?


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Location: Far, Far Away


All Mod Cons
New User

Sep 18, 2011, 8:07 AM

Post #6 of 16 (13921 views)
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Re: [sweetguy67] Toshiba Regza 37x3030DB Sound but no Picture [In reply to] Can't Post
Ok thanks, I'll see if I can find a manual online to identify what and where those boards are.


All Mod Cons
New User

Sep 18, 2011, 12:37 PM

Post #7 of 16 (13918 views)
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Re: [All Mod Cons] Toshiba Regza 37x3030DB Sound but no Picture [In reply to] Can't Post
I've found a manual but it doesn't mention those boards by name. Are they known as anything esle? I've done a visual check but can't see anything that looks damaged.


sweetguy67
New User

Sep 18, 2011, 2:41 PM

Post #8 of 16 (13917 views)
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Re: [All Mod Cons] Toshiba Regza 37x3030DB Sound but no Picture [In reply to] Can't Post
well the way to indeifie them is they are usuall two boards one on each side of the set,.be careful when you remove them , look them over both sides,.


All Mod Cons
New User

Sep 18, 2011, 3:44 PM

Post #9 of 16 (13912 views)
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Re: [sweetguy67] Toshiba Regza 37x3030DB Sound but no Picture [In reply to] Can't Post
I was trying to work out how to post a photo on here, but can't see how. Is it ok if I PM you with picture to see if you can identify the boards in question? I've been over the top side of everything that is visible but can't see any bad capacitors.


All Mod Cons
New User

Sep 18, 2011, 5:54 PM

Post #10 of 16 (13910 views)
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Re: [All Mod Cons] Toshiba Regza 37x3030DB Sound but no Picture [In reply to] Can't Post
Using the service manual I've identified the following boards:
Power - U01A
AV-Terminal - U03A
Digital U05A
Front -AV U03B
Key - U03D
LED - U03C
LOW-B -U02A
Signal - U04A
Are any of these the one's you suggested looking at - or possibly replacing for this fault? I have all the part numbers too.


All Mod Cons
New User

Sep 18, 2011, 6:50 PM

Post #11 of 16 (13905 views)
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Re: [All Mod Cons] Toshiba Regza 37x3030DB Sound but no Picture [In reply to] Can't Post
I've not found the inverter board that you mentioned. It looked ok, but I'm about to take it out again to get a closer look.
It's part number 6632L-0442A and also has the following numbers LC370wu1 and PPW CC37TS-0
Anyone know where I could buy a replacement board?


sweetguy67
New User

Sep 18, 2011, 7:05 PM

Post #12 of 16 (13903 views)
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Re: [All Mod Cons] Toshiba Regza 37x3030DB Sound but no Picture [In reply to] Can't Post
that sounds about right, let me know what you have found,carl


All Mod Cons
New User

Sep 18, 2011, 7:21 PM

Post #13 of 16 (13902 views)
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Re: [sweetguy67] Toshiba Regza 37x3030DB Sound but no Picture [In reply to] Can't Post
Got the inverter board in front of me now. It has two 35v 680uf capacitors. They don't look bad but they both have a slight brown'black mark on the top and one of them looks very slightly domed on top. I don't have any experience of what they should look like, but comparing to other caps on other boards, none of those have marks on the top.
Do you reckon that could be the fault? I've taken a photo I'll try to send to you.
Do you think it's worth starting with trying to find a replacement inverter board and if so, where's the best place to find one?
Thanks for your help.


sweetguy67
New User

Sep 18, 2011, 9:10 PM

Post #14 of 16 (13897 views)
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Re: [All Mod Cons] Toshiba Regza 37x3030DB Sound but no Picture [In reply to] Can't Post
if you can find thoise caps somewhere there and replace rthem that would be a starte and the cheapest way to go, carl


jts1957
Veteran


Sep 20, 2011, 2:47 PM

Post #15 of 16 (13879 views)
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Re: [All Mod Cons] Toshiba Regza 37x3030DB Sound but no Picture [In reply to] Can't Post
http://search.digikey.com/...amp;name=565-1580-ND


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Location: Far, Far Away


All Mod Cons
New User

Sep 20, 2011, 8:07 PM

Post #16 of 16 (13873 views)
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Re: [jts1957] Toshiba Regza 37x3030DB Sound but no Picture [In reply to] Can't Post
Thanks for all your help Carl. New caps arrived today. Fitted them just now and now have the picture back !! Excellent news and thanks to your help, £5 for a service manual to identify the parts and £1.98 for the capacitors, we now have a working TV that was about to be scrapped.
The set menu appears to be stuck and buttons on the remote don't let me change the set-up menus. But that is another problem which I'll have a look at.
Richard.

 
 
 


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