exxos's Atari, Amiga & retro forum

looking for help for my TT.

The problem:
The TT power supply do not works, replaced all capacitor but still not powering up (fan has a cycle of turning ON then OFF)

A solution:
I have a Mean Well RQ-65B power supply in stock, I know I can replace the original PSU with the Mean Well (see on EXXOS forum), but the TT required the "Power Good" signal from the PSU, which do not exist on the Mean Well.

The question:
Anyone replaced the original TT PSU with a Mean Well or an ATX power supply ? How ?

I AM AN IDIOT !

You replaced the diode and it fixed your problem?

zfrenchy wrote: 11 Oct 2025 22:44 ... but the TT required the "Power Good" signal from the PSU, which do not exist on the Mean Well.

The question:
Anyone replaced the original TT PSU with a Mean Well or an ATX power supply ? How ?

Use the Google Website Translator ...
https://forum.atari-home.de/index.php/t ... #msg262849

... I use a 1N4148 Diode connect to the +5V Line from the Mean Well PSU and you have a fake and working PowerGood for the Atari TT or MegaSTE Mainboard. It is in post #62 ...


But I think an original Atari built-in PowerSupply refurbished and repaired is the best.

zfrenchy wrote: 11 Oct 2025 22:44 The question:
Anyone replaced the original TT PSU with a Mean Well or an ATX power supply ? How ?

The answer:

https://www.16-32bit.eu/mste-tt-psu

And check here for more information:

viewtopic.php?p=135032#p135032