# Toshibs DVD Video Suddenly Dark

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#### bountyhunter

##### Well-Known Member
I have a Toshiba VCR/DVD Player combo. Suddenly for no reason, the DVD player lost all video output but still has audio. Video out is fine playing tape, no video on DVD. Tried disc cleaner and multiple DVDs. Don't have a schematic. Anything obvious on these before I punt it?

#### Nigel Goodwin

##### Super Moderator
Perhaps you might try posting the model number?.

A good possibility though is high-ESR electrolytics in the PSU.

#### bountyhunter

##### Well-Known Member
The model is SD-V392SUA.

I doubt it's the power supply because the VCR side works perfectly both in record and playback mode. I would assume they use a common power supply. I suppose it's possible the DV side has rails used only on that side.

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#### sheldonstv

##### New Member
well hopefully the manual will help you get it going-i have to repair these things day in day out so im pretty well used to it

#### bountyhunter

##### Well-Known Member
well hopefully the manual will help you get it going-i have to repair these things day in day out so im pretty well used to it
Can you still get replacement parts like the DSP chip?

#### sheldonstv

##### New Member
i believe so yes but i havent had to replace one yet in this model.....if needed one of my parts suppliers may be able to get one special order if it is needed-how far have you got with it?

#### unclejed613

##### Well-Known Member
did you mistakenly switch to some video mode that's not supported by the monitor? i see it a lot, or maybe (i know Pioneers do this) switch the video to one of the outputs you're not connected to? i.e. if your monitor is connected to the component jacks, did the output get switched to HDMI or composite? some models and brands supply video to all outputs simultaneously, some do not.

#### bountyhunter

##### Well-Known Member
i believe so yes but i havent had to replace one yet in this model.....if needed one of my parts suppliers may be able to get one special order if it is needed-how far have you got with it?
Honestly, I haven't torn into it much. I took the top off and wiggled all the ribbon connectors in thir sockets and wiggled the wires but no reaction. It's an old unit that does not have a dig tuner on board (have to use a converter box) so I will probably just use it as a backup VCR recording device for garbage programs like Jay Leno... I was using the DVD to dub material onto a DVD recorder but I have another machine to use if I have to do that.

I reviewed the schematics, and didn't see anything obvious or easy. I'm not motivated to put any time or money into it, and I don't have the desoldering equipment to change large SM IC's like the DSP chip anymore..

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#### bountyhunter

##### Well-Known Member
did you mistakenly switch to some video mode that's not supported by the monitor? i see it a lot, or maybe (i know Pioneers do this) switch the video to one of the outputs you're not connected to? i.e. if your monitor is connected to the component jacks, did the output get switched to HDMI or composite? some models and brands supply video to all outputs simultaneously, some do not.
No, it's hooked to the TV and I never switched anything... it just went dark on the video from the DVD side. The video from the VCR side of the unit is still fine,so I can still use it for that.

Really odd that the DVD player pooped out before the VCR, I have never heard of that happening.....

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#### unclejed613

##### Well-Known Member
the video processor for the DVD is on a different board, usually either the DVD driver board, or the DVD signals on newer machines tends to go straight to the HDMI board and is run through some DACs to make the analog outputs. it could be as simple as the analog video amp being bad or the HDMI chip, or other video processor chip. if you're getting audio there's nothing wrong with the DVD mech or optics, since the video and audio reside in the same data stream from the disk surface. if it's a black screen but you have sync, then it's most likely somewhere other than the analog chip that buffers the signals. have you tried checking other video outputs for signal (if any)? in 480p or 480i mode, the green jack will give a visible (in black and white, and a double picture in 480p) on a composite monitor. if you have signal there, chances are it's the combiner for the composite signal, or an analog switch in the composite signal chain (like the switch that switches between VCR and DVD video, which it could be). a lot of these chips are surface mount dips that have very small pin pitches, or worse, little 24 pin BGA chips with the solder blobs UNDER the chip. these aren't simple to replace anymore (even with SMT skills, the BGA chips are pretty much a no-go, since you have to place the chip "blind", and if it works it works, but if it doesn't work you're done...)

#### bountyhunter

##### Well-Known Member
the video processor for the DVD is on a different board, usually either the DVD driver board, or the DVD signals on newer machines tends to go straight to the HDMI board and is run through some DACs to make the analog outputs. it could be as simple as the analog video amp being bad or the HDMI chip, or other video processor chip. if you're getting audio there's nothing wrong with the DVD mech or optics, since the video and audio reside in the same data stream from the disk surface. if it's a black screen but you have sync, then it's most likely somewhere other than the analog chip that buffers the signals. have you tried checking other video outputs for signal (if any)? in 480p or 480i mode, the green jack will give a visible (in black and white, and a double picture in 480p) on a composite monitor. if you have signal there, chances are it's the combiner for the composite signal, or an analog switch in the composite signal chain (like the switch that switches between VCR and DVD video, which it could be). a lot of these chips are surface mount dips that have very small pin pitches, or worse, little 24 pin BGA chips with the solder blobs UNDER the chip. these aren't simple to replace anymore (even with SMT skills, the BGA chips are pretty much a no-go, since you have to place the chip "blind", and if it works it works, but if it doesn't work you're done...)

Interesting.

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