Falcon - NO VIDEO SIGNAL
Re: Falcon - NO VIDEO SIGNAL
Despite a new PSU, still no signal ;(
Re: Falcon - NO VIDEO SIGNAL
No video can be bad NVRAM settings, or missing 12V on the video DAC.
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viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
Re: Falcon - NO VIDEO SIGNAL
thanks for the replies.
If it were one of the both, where is the problem located on the motherboard, how to fix and what elements are needed to fix them?
Thanks
If it were one of the both, where is the problem located on the motherboard, how to fix and what elements are needed to fix them?
Thanks
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- Joined: Mon Sep 03, 2018 9:15 pm
Re: Falcon - NO VIDEO SIGNAL
If 12V is missing, you don't get RGB output. Actually seems a common fault. Seems like the dac fails (cant see 12V on it, thought there was), but never bothered to really look into it much.CodeKiller wrote: ↑Tue Sep 04, 2018 8:26 am Tbh the video DAC does not need 12V but the PAL/NTSC encoder does -- if you have it (and a modulator) installed.
If the internal fan spins, then you have 12V.
Not everyone has a fan installed, and just because 12V is is on the fan, doesn't mean 12V is reaching everywhere else it needs to go. Same with the 5V rail. Blown power tracks seems common.
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
-
- Posts: 4
- Joined: Mon Sep 03, 2018 9:15 pm
Re: Falcon - NO VIDEO SIGNAL
https://www.exdwh.com/data/STV8438CV.pdf
You can even check the gerbers: no 12V trace goes to the RGB DAC.
It was an answer to "is there?" not for "is everywhere?". Of course it can be blown track, but that would be highly unlikely or at least clearly visible.
But it is not the case with the 5V. It is distributed on a power plane, so only vias/leads can be damaged (locally at a chip) but no power trace (as there isn't any)