Electronics > Repair
What more i can do?
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222Lab_Test222:

--- Quote from: Harry_22 on November 21, 2024, 03:45:30 am ---Ring A8 through all the board. Use the broom to speed up the process.
Please make a photo of the bottom PCB side.

--- End quote ---

A8 is connected to IC9 Tornado pin 23.
Here is back side..

Top left is Power supply then there is CPU then BIOS.
222Lab_Test222:

--- Quote from: Harry_22 on November 21, 2024, 04:24:08 am ---.
Is it behavior different time to time?

--- End quote ---

Yeah sometimes it glows, sometime it doesn't...

For working it should be dim glow continuous.
Harry_22:

--- Quote from: 222Lab_Test222 on November 21, 2024, 04:30:15 am ---
--- Quote from: Harry_22 on November 21, 2024, 04:24:08 am ---.
Is it behavior different time to time?

--- End quote ---

Yeah sometimes it glows, sometime it doesn't...

For working it should be dim glow continuous.

--- End quote ---
What is a signal monitored here? CLK?
Harry_22:

--- Quote from: 222Lab_Test222 on November 21, 2024, 04:28:47 am ---
--- Quote from: Harry_22 on November 21, 2024, 03:45:30 am ---Ring A8 through all the board. Use the broom to speed up the process.
Please make a photo of the bottom PCB side.

--- End quote ---

A8 is connected to IC9 Tornado pin 23.
Here is back side..

--- End quote ---

... back side of the Moon.

Please make a broom from the wire, connect it to the multimter with fast short ring responce and "clean" all the back side.
We have to know all the points with A8 address.
Could you check also the data bus. For instance Q1.

It would be good to ring All the Data and Address busses for short to +5V and Gnd. Just to be shure.

It would be very good to know the chip names from the back side.
222Lab_Test222:

--- Quote from: Harry_22 on November 21, 2024, 06:12:48 am ---

--- End quote ---
What is a signal monitored here? CLK?
[/quote]

As it is connected to the IC5 IC, i guess the output of IC5 leads to this, not sure though
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