CDTV jumping display

[christopherpm]

Hi, I have a CDTV with a display issue (Rev 2.2.1 motherboard). After being switched on for a couple of minutes, the display starts flickering / jumping.

I have 2 x RF video modules, 1 x scart video module and a 23-pin->Scart cable - all of which were working fine for absolutely ages. This issue is a few weeks old.

I have removed the casing, and cannot see any signs of leakage on the electrolytic capacitors.

Any help to keep this CDTV going would be really appreciated.

[paul1981]

Hi, I have a CDTV with a display issue (Rev 2.2.1 motherboard). After being switched on for a couple of minutes, the display starts flickering / jumping.

I have 2 x RF video modules, 1 x scart video module and a 23-pin->Scart cable - all of which were working fine for absolutely ages. This issue is a few weeks old.

I have removed the casing, and cannot see any signs of leakage on the electrolytic capacitors.

Any help to keep this CDTV going would be really appreciated.

Not wishing to insult your intelligence here, but have you tried a different display?

I'm only saying it because you haven't mentioned it.

[mechy]

Hi, I have a CDTV with a display issue (Rev 2.2.1 motherboard). After being switched on for a couple of minutes, the display starts flickering / jumping.

I have 2 x RF video modules, 1 x scart video module and a 23-pin->Scart cable - all of which were working fine for absolutely ages. This issue is a few weeks old.

I have removed the casing, and cannot see any signs of leakage on the electrolytic capacitors.

Any help to keep this CDTV going would be really appreciated.

I would check all psu voltages.
if they are good, reseat the chips.
if that doesn't work i would possibly suspect caps.

[utri007]

I had same problem with my CDTV. Cure was keep it on several hours.

It wasn't used for years, so I ques capasitors just needed some juice.

[christopherpm]

Not wishing to insult your intelligence here, but have you tried a different display?

I'm only saying it because you haven't mentioned it.

Actually no. It's connected to my living room TV. I have connected it the SCART socket, RF and via composite and all three give the same outcome.

Anything else that gets connected to the TV works just fine (as did this CDTV until a little while ago).

[christopherpm]

Cure was keep it on several hours.

I worry that keeping it on may cause further damage, and I really don't want that to happen!

[christopherpm]

I would check all psu voltages.
if they are good, reseat the chips.
if that doesn't work i would possibly suspect caps.

I will do so at the weekend.

[midway]

There are SMD caps (electrolytic ones) which can leak. Mine was flickering when on the DCTV start screen when I used the Cinch output, bot the SVideo. when you pull out the video module look for leaked cap signs.

[christopherpm]

I've had the CDTV diagnosed, and it was a faulty Agnus in my MegAChip causing the issue