Not sure but this looks like a reset cap issue, any thoughts? This is one of my STE's I am trying to get back to health.
I have done the main fixes except the reset cap fix but wanted to see if it could be anything else video related. I have also tried two recapped PSU's too. I can post pics of the board if needed later
Via RF I get this screen first (moving)
It then does this
And then this, image is stable and as you would expect from rf a little fuzzy.
However the main problems starts when I plug in the RGB Scart cable into the monitor socket, it sometimes boots and goes to desktop.
Other times it works and then shortly after the image starts wobbling
Other times I get a rolling picture
Other times it will be off screen
Other time I get this
I plug in the RF I get the above again.
Atari STE Power Up
-
- Posts: 77
- Joined: Sun Jan 17, 2021 1:34 pm
Re: Atari STE Power Up
Oh also to add, everything else works fine the drive and it even loads software in the background.
If it was an STFM I would look at video recap or inspecting around the shifter so a little puzzled
If it was an STFM I would look at video recap or inspecting around the shifter so a little puzzled
Call me Stephen
Re: Atari STE Power Up
What RGB cable are you using ? Doing to reset caps doesn't take long, so just get it done and save some headaches.
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: 77
- Joined: Sun Jan 17, 2021 1:34 pm
Re: Atari STE Power Up
It’s an RGB to scart cable from cool novelties, found them to be the best tbh. Are you thinking to try another cable?
Call me Stephen
Re: Atari STE Power Up
I half recall someone else having this issue recently but can't remember the outcome have you taken the large chip out from under the PSU and cleaned it, maybe resolder the socket..
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.
- rubber_jonnie
- Site Admin
- Posts: 10472
- Joined: Thu Aug 17, 2017 7:40 pm
- Location: Essex
- Contact:
Re: Atari STE Power Up
I'm quite surprised that you even got a signal via RF on that modern TV!
If you've done all the other fixes, then I would just do the reset caps to cover all bases. It sounds like power isn't a problem, but IIRC, not all RGB SCART cables are created equal so it may be worth also trying a different one. Similarly some modern TVs don't play nice with older scart.
I have a Coolnovelties cable and it works just fine.
BTW, have you pulled the mainboard and checked the solder under the video out connector to make sure it is good? You could also try a VGA adaptor, see if you get a different result on a VGA display, providing it supports 15Khz.
If you've done all the other fixes, then I would just do the reset caps to cover all bases. It sounds like power isn't a problem, but IIRC, not all RGB SCART cables are created equal so it may be worth also trying a different one. Similarly some modern TVs don't play nice with older scart.
I have a Coolnovelties cable and it works just fine.
BTW, have you pulled the mainboard and checked the solder under the video out connector to make sure it is good? You could also try a VGA adaptor, see if you get a different result on a VGA display, providing it supports 15Khz.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
Re: Atari STE Power Up
You mentioned you have other Ataris? I assume this TV picks up SCART RGB from those other units using the same cable OK? (Just to rule out any TV issue)
Re: Atari STE Power Up
Some TV doesn't support RGB over SCART, but even if they do, there are several problems.
1. STfm doesn't have a composite sync signal used by SCART RGB, instead composite video signal is used.
2. Some TV, have support for RGB mode, but make only automatic switching between composite and RGB. In RGB mode, the composite sync signal is supplied by the same pin, as composite video signal is supplied in composite mode. There is another pin for switching between composite and RGB, but Atari doesn't have appropriate voltage on the monitor output to correctly switch the SCART to the RGB mode. The current output of 12V pin is far too low to do that.
1. STfm doesn't have a composite sync signal used by SCART RGB, instead composite video signal is used.
2. Some TV, have support for RGB mode, but make only automatic switching between composite and RGB. In RGB mode, the composite sync signal is supplied by the same pin, as composite video signal is supplied in composite mode. There is another pin for switching between composite and RGB, but Atari doesn't have appropriate voltage on the monitor output to correctly switch the SCART to the RGB mode. The current output of 12V pin is far too low to do that.
-
- Posts: 77
- Joined: Sun Jan 17, 2021 1:34 pm
Re: Atari STE Power Up
I will give that a try
I went one further than that and replaced the video out connector, still the same issue.rubber_jonnie wrote: ↑Fri Jun 11, 2021 9:55 am BTW, have you pulled the mainboard and checked the solder under the video out connector to make sure it is good? You could also try a VGA adaptor, see if you get a different result on a VGA display, providing it supports 15Khz.
The cable works with the other machines so its not the cable, this is fun
This is a Plasma TV and works great with RGB.tzok wrote: ↑Fri Jun 11, 2021 10:13 am Some TV doesn't support RGB over SCART, but even if they do, there are several problems.
1. STfm doesn't have a composite sync signal used by SCART RGB, instead composite video signal is used.
2. Some TV, have support for RGB mode, but make only automatic switching between composite and RGB. In RGB mode, the composite sync signal is supplied by the same pin, as composite video signal is supplied in composite mode. There is another pin for switching between composite and RGB, but Atari doesn't have appropriate voltage on the monitor output to correctly switch the SCART to the RGB mode. The current output of 12V pin is far too low to do that.
Thank you for all the suggestions guys, I'll do the reset cap fix and try the big chip under the PSU. (out of curiosity what is that chip?) I may have a spare so will give that a go too.
It is weird as it work fine via RGB Scart but after a short time it starts playing up, maybe the chip has been damaged by a bad PSU over time etc...
Call me Stephen
-
- Posts: 77
- Joined: Sun Jan 17, 2021 1:34 pm
Re: Atari STE Power Up
Another screen over RGB scart just to add to the library
This is static but sometimes it rolls
This is static but sometimes it rolls
Call me Stephen