Hi,
I got a SM 124 in an auction (together with a Mega ST) and that monitor
a) isn't very bright, but works on the Mega ST it came with
b) makes the picture "jump" vertically on a another Mega, esp. when there's disc access or when the blitter is heavily used
c) doesn't work on a 1040 STF - the 1040 continously reboots after a few seconds (with either a white or black screen)
Inside of the monitor I saw that the large 100uF (400V) capacitor was a little bit bulky on the top (the other capacitors looked ok, although they certainly have aged too), so I replaced it, but that didn't fix any of the issues.
Does anyone have an idea what's going on here? I find esp. b) and c) a little bit scary ...
Scary SM 124 behaviour
Re: Scary SM 124 behaviour
Disk access issues are normally bad PSU in the machine.pixelpusher wrote: ↑Fri Jan 03, 2020 8:21 pm b) makes the picture "jump" vertically on a another Mega, esp. when there's disc access or when the blitter is heavily used
Maybe bad mono detect connection on the socket or plug.pixelpusher wrote: ↑Fri Jan 03, 2020 8:21 pm c) doesn't work on a 1040 STF - the 1040 continously reboots after a few seconds (with either a white or black screen)
It is best to change aging mains caps, but the bulge is normally just the plastic on top warping over time.. if its a metal top and bulging then its likely about to go boom.pixelpusher wrote: ↑Fri Jan 03, 2020 8:21 pm Inside of the monitor I saw that the large 100uF (400V) capacitor was a little bit bulky on the top (the other capacitors looked ok, although they certainly have aged too), so I replaced it, but that didn't fix any of the issues.
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viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
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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.
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Re: Scary SM 124 behaviour
I swapped the PSUs and checked the machines also with another SM124 and a TFT. Only this auction monitor triggers this behaviour. I'll check for cable for mono detection (I don't think that two machines suddenly have an issue with their socket - and then only when they are connected to this specific monitor)