I have ALL external connections (except power and monitor), HD and memory disconnected. Power on comes up blank monitor screen, no beeps , amber power light, blinking 234. During power on, fan starts slowly and within 2 or so seconds on full blast and it stays that way. Power supply has green light. ram battery is good (3.3V). Looking for thoughts. Motherboard LED is on.
Hi LKsaawin, was there any recent BIOS/ software updates on the system? Please private message us the service tag of the system so that we can check on the system warranty.
Hello, I have a Dell OptiPlex 990 as well with the same problem. Diag lights 2, 3 & 4 are flashing and the power light is solid amber. What are the chances 2 machines doing this in the same week? Mine just rebooted watching TV on it. And on reboot I had the error lights flashing. I have pulled all hardware that was installed one at a time and still the same results. If it's the BIOS, I installed A24 several months ago. Could it be a recent update from the Dell Support Assistant or Windows update? I am running Windows 10 PRO.
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I've just had the same issue with my 990, 234 flashing amber and solid amber power led. Was there any resolution other than replacing the motherboard?
Seem odd that a few of us have had the same issue at a similar time. Makes me think it was update related. I can't remember what version bios I was on. Haven't updated it for a few years. It's quite possible windows did an update overnight before mine broke but I have no way of knowing
I've tried resetting/clearing the cmos and just about everything else.
Memory subsystem configuration activity is in progress. Appropriate memory modules were detected but a memory failure has occurred.
If you can assist to troubleshoot, narrow down the issue with reseating memory and swapping a known good memory if available.
If nothing works, replace the memory.
Power Button LED State Description
Off
Power is Off. LED is blank.
Blinking Amber
Initial State of LED at power up. Refer to the table below for Blinking Amber pattern diagnostic suggestions and possible failures.
Solid Amber
The second state of the LED at power up, indicates that the POWER_GOOD signal is active and it is probable that the power supply is fine.
Blinking White
System is in a low power state, either S1 or S3. This does not indicate a fault condition.
Solid White
System is in S0 state. This is the normal power states of a functioning machine. The BIOS will turn the LED to this states to indicate it has started fetching op-codes.
toml1948
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Posted December 26th, 2019 14:00
My solution was to replace the motherboard. No idea how to reflash the bios if, indeed, that was the problem.