LH4 problems

[noelsaw]

I bought a used LH4. I can see that there are 4 processors installed but for some reason the motherboard bios only sees 1 processor. How do I make sure the VRMs are installed? I didn't get a copy of the manual.

I also get these POST error messages. Can anyone help me dicpher?
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006 00210 02/01/02 06:26:22 Voltage sensor number: 6 crossed the lower critical threshold. (CPU P1 volt)
007 00800 02/01/02 06:26:23 PSU: Power failed in sensor number: 11, power supply unit 2 (Power Supply 2)
008 00900 02/01/02 06:26:26 Unknown record type: 02:20:00:02:09:0E:0B:82:2F:FF
009 00212 02/01/02 06:26:28 Voltage sensor number: 8 crossed the lower critical threshold. (CPU P3 volt)
010 00211 02/01/02 06:26:31 Voltage sensor number: 7 crossed the lower critical threshold. (CPU P2 volt)
011 00218 02/01/02 06:26:40 Voltage sensor number: 10 crossed the lower critical threshold. (Cache 1:2 volt)

[Chris Blumenshine]

First thing I would do is upgrade the system bios. Current is 4.06.36:
http://www.hp.com/cgi-bin/cposupport/swindex.pl?p=hpnetserve10713&l=en&c=BIOS
It does sound like an issue with vrm???s. The system requires 6 vrm???s for 4 cpu???s. Here is the technical reference card showing where they are located:
http://netserver.hp.com/docs/download.asp?file=trlc_lh4_lh4r.pdf
If you have all the vrm???s installed, check the dimm led???s on the memory boards as the system boots. The status of these led???s can lead you to the faulty component quickly. Section C on the reference card tells what the led???s status means. Also, reseat everything: system board, cpu???s, vrm???s, just in case something came loose in shipping.