Re: sanyo model FV3982 intermittent sound but no picture
ok, I ran TV out of the outside case for hours. It worked fine and never went to a black screen with sound only. Only variable is that the garage is cool, around 50 degrees. I added some ventilation holes with a drill in the back near the boards and put it back together. I now have it playing in the house where it is warmer. So far, so good. Did anyone ever run into this problem?
Dan Surra
Member
Last Activity: 01-05-2017, 03:01 PM
Joined: 12-05-2016
Location: Kersey,,PA
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sanyo model FV3982 intermittent sound but no picture
this TV works fine for a while and then goes to a black screen. Tore the back off of it and cant see any obvious problems. Any advice? -
Re: Toshiba regza 52" sound no picture
I found the board on ebay by typing in the part #. The company was Electroparts. All parts come with a 180 day warranty and includes shipping.Leave a comment:
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Re: Toshiba regza 52" sound no picture
looked good. board came from TV that fell and cracked the screen. I'll post company name when I get package from garage. It comes with a warranty which is surprising with electrical stuff.Leave a comment:
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Re: Toshiba regza 52" sound no picture
Well, the replacement inverter board came yesterday and I put it in today. [B]IT WORKS!!!! [/B]I didn't have it on cable but I can get the menu up and the no video bar scrolling. I had nothing but sound before. I have no cable over the garage but I HAVE A PICTURE.
I really want to thank [B]budm[/B] and [B]vinceroger69[/B] for being patient with me and all your assistance. It took me some time but with your assistance we narrowed the problem down. A new board cost me $16 delivered. Was worth the shot.
Next, I am going to tear...Leave a comment:
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Re: Toshiba regza 52" sound no picture
I'll see if it's still available. I will let you know how I make out. thanks vince and budm for all your advice and assistance.Leave a comment:
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Re: Toshiba regza 52" sound no picture
Around $15. The fuses on the other inverter boards are OK.Leave a comment:
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Re: Toshiba regza 52" sound no picture
Ok, the 5 pin mosfets (little black square things) with 5 tabs and center one cut #s are (as best I can read them with these old eyes) STU405DH and under that is a small triangle with 7C405. The bottom of the board under these is discolored and brownish. It looks as if I can buy this board relatively cheap. Do you think it is worth a shot or is there a high probability of other issues?Leave a comment:
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Re: Toshiba regza 52" sound no picture
OH MAN!! Laughing here Budm. What does that say in English (laymens) terms.Leave a comment:
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Re: Toshiba regza 52" sound no picture
OK, still waiting to hear from budm. would just replacing that board be an option an affordable option? I will ck on the capacitors but I am pretty sure they are all 680uf 35v.Leave a comment:
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Re: Toshiba regza 52" sound no picture
thanks vince. I think I can replace the capacitors and fuse. Can you purchase the boards and how much would it cost? I will wait to hear from budm as how to proceed. You guys have been great.
It is interesting to note that I have another set that has same issue (sound but no pic). Both sets quit when my Dish picture was freezing and it was in freeze mode till pic when dark. Can't prove it was related but sure seems suspicious.Leave a comment:
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Re: Toshiba regza 52" sound no picture
OK, I am not sure which pieces are the fuses as I do not have diagrams for the inverter boards. However, after looking at them, I checked piece F201, F200, F400, and f401 as they look as if they could be some type of fuseable link. F200,400, and 401 have continuity. F201 is open and I would assume a blown fuse. Also, the yellow parts (capacitors??) with the brown stuff oozing out of them are shorted when I check with an ohm meter. The other 6 yellow pieces are not shorted as I get some kind of reading on ohms setting although I have no...Leave a comment:
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Re: Toshiba regza 52" sound no picture
And I checked the screen with the garage pretty dark. There is no flash of light on the screen that I can see. I also looked from the back of the set with cover removed as I have it, no flash of lights.Leave a comment:
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Re: Toshiba regza 52" sound no picture
OK, when I removed the shields from the left (from rear) inverter board I noticed some imperfections on two yellow cylindrical parts. They could be condensors, I don't know. Each board has 4 of them. Two at top and two at bottom of the board. The top two on left side have a brown substance that has oozed out of the back side. Also, the soldered area on the board itself looks like it may have gotten hot. I have also attached a picture of a set that looks like all the others. Could these two pieces have blown out?
[ATTACH]146514[/ATTACH]...Leave a comment:
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Re: Toshiba regza 52" sound no picture
[ATTACH]146511[/ATTACH]
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[ATTACH]146513[/ATTACH]these are same views of left (from rear) inverter boardRe: Toshiba regza 52" sound no picture
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[ATTACH]146513[/ATTACH]these are same views of left (from rear) inverter boardRe: Toshiba regza 52" sound no picture
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[ATTACH]146512[/ATTACH]
[ATTACH]146513[/ATTACH]these are...Leave a comment:
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Re: Toshiba regza 52" sound no picture
Ok, I removed the inverter board shields and took pics of connectors. There will be pics of the main connector and then one that is in the middle of the board. I will post them first from right side (from rear of tv) and then from left. I also found something interesting that may indicate a problem. I will post those pics after the connectors. these pic are of the whole board and then the connectors rt from rear[ATTACH]146508[/ATTACH]
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[ATTACH]146510[/ATTACH]Re: Toshiba regza 52"...Leave a comment:
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Re: Toshiba regza 52" sound no picture
I have NO clue vinceroger, LOL. Is there a board that we could try and replace that doesn't cost more than the unit is worth?Leave a comment:
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Re: Toshiba regza 52" sound no picture
Ok, I have 24v at all inverter board terminals and 3.26v at BL-ON terminal. Where do I go from here? From standpoint of a novice, I have received some great advice on here. Hope we can figure out what is causing sound and no pic issue. I hate to trash the unit.Leave a comment:
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Re: Toshiba regza 52" sound no picture
It blinks three times, twice (yellow) when first powering up and then goes to a solid green. I believe it always did this when turning the set on. Hope this helps, Bud. You've been a great help Bud. Any suggestions as to what else I can check?Leave a comment:
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Re: Toshiba regza 52" sound no picture
OK, was able to get some readings on the BL-ON CN61 connector today. They are as follows, pin 1 BL ON actual 3.26v (listed to be 5v), pin 2 empty, pin 3 empty, pin 4 VBR actual 3.28v (0-3.3v listed), pin 5 BL Det actual 3.25 (none listed), pin 6 continuity to ground, pin 7 empty. These were taken with the unit turned on.
Thanks in advance.Leave a comment:
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