i have a couple intel d850mv motherboards made for gateway Lexington desktop (board revision a87987-603), refurbed but never installed (supposedly). http://support.gateway.com/s/MOTHERBD/INTEL/2517882/2517882sp37.shtml
i'm trying to test them (workbench, no case) and cant even get them to post. with just CPU, memory & vid card the board will power up, spin cpu fan, and light the power & diagnostic LEDs when i flip the switch on the back of the PSU (cheiftain 500W fresh from the box) - it doesnt wait for the case connector power switch pins to be shorted like other boards require. the diagnostic LED indicates some MB subsystem failed diagnostics as it stays lit red for the 2-3 minutes i felt safe leaving it powered on. there is no video output from a agp4x MX480E - card tested fine in an AMD system. i'm not able to test kingston 1066 2x256 or toshiba 600 2x64 rambus or 2xCIMMs beyond leaving mem slots empty and getting the familiar 3 beeps, and no beeps when mem is installed. nor do i have another working system to test the P4 478 1.7 256k 400fsb processor. i know this is old stuff, but perhaps someone remembers whether a bad CPU or memory might cause the diagnostic LED on this MB to indicate a failure that's not really on the MB. if no one can say for sure, then i'll try and find another cpu at my leisure to test it out. i'd be glad to read any thoughts or suggestions u may have. thanks for your help
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Did you install the Memory in proper pairs? Rambus must be installed in matching pairs, and density's, I suggest testing only one of the sets, but be sure you have them in the right slots. Some RDRAM boards the pairs are 1 and 3, and 2 and 4 respectively...... and others 1 and 2, and 3 and 4 are pairs
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yes i properly installed the seperate pairs per a MB diagram - 2 256mb, & 2 64mb of rambus with the cimms in the other 2 slots, as well as both pairs - same non working result 3 ways. the MB specs indicate it works with 600/800/1066. still wondering if anyone has experience with persistent red LED caused by bad memory or CPU.
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Well I mean you should test one set by itself then, the 64 one may be different density chips then the 256 ones so they may not work together. If you already did that, then dont mind me! I just sold my rdram board last year so just trying to help

And I had that board, and a intel one later
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