Merely going to any negative (-) / ground (common) left the light illuminated constantly rather than with disk activity. After testing for voltage, resistance and continuity, I managed to get the HDD LED on the case working by splicing in the negative (-) / ground (common) wire to the green HDD lead going to the second pin in from the corner nearest the center of the motherboard. After quite a bit of time scouring the web and getting nowhere, I disassembled the front panel I/O assembly and removed the diagnostic/HDD LED assembly. So the bi-color LED shows through to indicate power/failure state. I actually disassembled the power button and used just the interior portion to replace the original green power LED, making sure not to push it in far enough to depress the switch. Shorting them brings the voltage low enough to cause PSON (power supply on). So the yellow was negative (-) / ground (common) and the black was positive (+) 5VDC. They both lead to negative (-) / ground (common). I can confirm that pins 1 and 5 (yellow and red) are shorted together. P/N 085DX6 I spliced in the new case’s momentary contact power switch to the appropriate leads. I found information on the web about the 5 wire pinout for the power button and bi-color LED harness with 6 pin connector (one cut and used as key). Use this information at your own risk and ALWAYS confirm everything personally because assumptions are the mother of all mistakes. I am not a manufacturer, engineer, work for Dell or even have any credentials to show that I might know what I’m doing. Do what you do and don’t blame me for anything. Here’s what needed to happen to make it function properly.ĭISCLAIMER: I am not responsible for anything in your life.
DELL MIH61R MOTHERBOARD 16 PIN LAYOUT FULL SIZE
Being driven by a desire to expand functionality and mitigate temperature concerns, I have successfully migrated necessary components from a Dell Optiplex 390 DT from its originally case to a full size ATX case that was from the first computer I built years ago! What I started, thinking it would be a simple task, was tedious, meticulous and potentially hazardous to my equipment.
0 kommentar(er)
