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Spektre
Spektre
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well I would use oscilloscope and look if:

  1. clock is running
  2. data and address buss is alive

that can rule out CPU and MEMORY side problems. If working measure the modulator input/output if tiit produces signal. If yes the problem is either in cables or in the monitor itself. Otherwise you might have problem with graphics ICs. However take in mind I am not familiar with ATARI so I do not know its internal architecture.

What 60Hz over 50Hz means?

For linear transformers power supplies it means the inductance is usually higher than designed which could lead to over voltage. And also the inefficiency can be higher (more heating of the transformer) But most of the electronics have a voltage regulator unit so the output should be fine the problem is the regulator itself can heat quite a bit more than usually so check/upgrade heatsinks so they do not damage plastic casing nearby.

Also some electronics use the frequency as timing. This was true for any TV in my region back in the day. If your monitor is the same that might by the problem as the video signal is out of sync with monitor then And. In such case the screen is either unstable (blinking scrolling skewing) or video signal is ignored by the monitor completely.

If the case you can try to use some kind of AC/AC converter. I think there was few APC/UPS power protection units that produces 50Hz 220V output from any input to protect electronics from bad power supply.

well I would use oscilloscope and look if:

  1. clock is running
  2. data and address buss is alive

that can rule out CPU and MEMORY side problems. If working measure the modulator input/output if ti produces signal. If yes the problem is either in cables or in the monitor itself. Otherwise you might have problem with graphics ICs. However take in mind I am not familiar with ATARI so I do not know its internal architecture.

What 60Hz over 50Hz means?

For linear transformers power supplies it means the inductance is usually higher than designed which could lead to over voltage. And also the inefficiency can be higher (more heating of the transformer) But most of the electronics have a voltage regulator unit so the output should be fine the problem is the regulator itself can heat quite a bit more than usually so check/upgrade heatsinks so they do not damage plastic casing nearby.

Also some electronics use the frequency as timing. This was true for any TV in my region back in the day. If your monitor is the same that might by the problem as the video signal is out of sync with monitor then And the screen is either unstable (blinking scrolling skewing) or ignored by the monitor completely.

If the case you can try to use some kind of AC/AC converter. I think there was few APC/UPS power protection units that produces 50Hz 220V output from any input to protect electronics from bad power supply.

well I would use oscilloscope and look if:

  1. clock is running
  2. data and address buss is alive

that can rule out CPU and MEMORY side problems. If working measure the modulator input/output if it produces signal. If yes the problem is either in cables or in the monitor itself. Otherwise you might have problem with graphics ICs. However take in mind I am not familiar with ATARI so I do not know its internal architecture.

What 60Hz over 50Hz means?

For linear transformers power supplies it means the inductance is usually higher than designed which could lead to over voltage. And also the inefficiency can be higher (more heating of the transformer) But most of the electronics have a voltage regulator unit so the output should be fine the problem is the regulator itself can heat quite a bit more than usually so check/upgrade heatsinks so they do not damage plastic casing nearby.

Also some electronics use the frequency as timing. This was true for any TV in my region back in the day. If your monitor is the same that might by the problem as the video signal is out of sync with monitor. In such case the screen is either unstable (blinking scrolling skewing) or video signal is ignored by the monitor completely.

If the case you can try to use some kind of AC/AC converter. I think there was few APC/UPS power protection units that produces 50Hz 220V output from any input to protect electronics from bad power supply.

Source Link
Spektre
Spektre
  • 7.4k
  • 17
  • 33

well I would use oscilloscope and look if:

  1. clock is running
  2. data and address buss is alive

that can rule out CPU and MEMORY side problems. If working measure the modulator input/output if ti produces signal. If yes the problem is either in cables or in the monitor itself. Otherwise you might have problem with graphics ICs. However take in mind I am not familiar with ATARI so I do not know its internal architecture.

What 60Hz over 50Hz means?

For linear transformers power supplies it means the inductance is usually higher than designed which could lead to over voltage. And also the inefficiency can be higher (more heating of the transformer) But most of the electronics have a voltage regulator unit so the output should be fine the problem is the regulator itself can heat quite a bit more than usually so check/upgrade heatsinks so they do not damage plastic casing nearby.

Also some electronics use the frequency as timing. This was true for any TV in my region back in the day. If your monitor is the same that might by the problem as the video signal is out of sync with monitor then And the screen is either unstable (blinking scrolling skewing) or ignored by the monitor completely.

If the case you can try to use some kind of AC/AC converter. I think there was few APC/UPS power protection units that produces 50Hz 220V output from any input to protect electronics from bad power supply.