1 Rookie
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2 Posts
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57
November 14th, 2025 13:33
OptiPlex 3000 Micro undocumented diagnostic light combo?
Hello
I have several micros that don't seem to want to boot up.
I've checked the service manual, but am not finding a match for a "7 white - 3 white" combo.
Anyone know where I should start with these?
Thanks in advance
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Chad AA
1 Rookie
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2 Posts
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November 18th, 2025 17:21
Tried a different power supply and so far, the first PC has sprung back to life
anne_droid
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1.2K Posts
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November 14th, 2025 15:09
Hi
No, not really.
The suggestion is that it is a Main Board problem, but with several units suffering, I think it is an update to some firmware or similar.
So, BIOS, can it be rolled back or updated or RCV file used.
Is the failure likely to be with the POST, and dis-assembling Johnny Five, leaving only those components soldered onto the mainboard and see if that triggers any POST errors.
Re-Build step by step.
If in doubt please ask.