Optiplex 740 - Diagnostic Light = 4 - Won't boot

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Optiplex 740 - Diagnostic Light = 4 - Won't boot

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I have an Optiplex 740 that suddenly quit working. Initially it was showing codes 3+4 indicating a memory error. After trying all the normal stuff I bought new memory... now I get just get a 4 in the diagnostic lights, which according to the manual is a bios issue and they recommend running the bios utility. Problem is I can't boot to run anything. Tried powering off, unplugging, removing battery, etc, to no avail. Any thoughts or suggestions?

Thanks in advance,

Mike5287

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  • Did you try resetting the CMOS via the jumper on the motherboard?

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