Re: hp 9000 C3750 hardware problem (partially off-topic)

[Paolo Borsa <samvise@hobbiton.it>]

Thanks, you all were right, eventually I found the problem. The capacitor fell down from the back of a memory module. https://drive.google.com/open?id=1XM1flQz7lMotcmNZdnDozLOFDJeaf6v-rA  Now I resoldered it and the system is working, here are the info:

rocky:/proc# uname -a

Linux rocky 2.6.26-2-parisc #1 Sun Mar 4 17:37:14 UTC 2012 parisc GNU/Linux

rocky:/proc# cat cpuinfo 

processor       : 0

cpu family      : PA-RISC 2.0

cpu             : PA8700 (PCX-W2)

cpu MHz         : 875.000000

model           : 9000/785/C3750

model name      : Allegro W2

hversion        : 0x00005dc0

sversion        : 0x00000481

I-cache         : 768 KB

D-cache         : 1536 KB (WB, direct mapped)

ITLB entries    : 240

DTLB entries    : 240 - shared with ITLB

BTLB            : not supported

bogomips        : 1744.89

software id     : 2000777092

rocky:/proc# cat meminfo 

MemTotal:      3627816 kB

MemFree:       3550872 kB

Buffers:          5468 kB

Cached:          40312 kB

SwapCached:          0 kB

Active:          31052 kB

Inactive:        28252 kB

SwapTotal:      979956 kB

SwapFree:       979956 kB

Dirty:              36 kB

Writeback:           0 kB

AnonPages:       13540 kB

Mapped:          10552 kB

Slab:             5244 kB

SReclaimable:     2304 kB

SUnreclaim:       2940 kB

PageTables:        976 kB

NFS_Unstable:        0 kB

Bounce:              0 kB

WritebackTmp:        0 kB

CommitLimit:   2793864 kB

Committed_AS:    91584 kB

VmallocTotal:   245728 kB

VmallocUsed:      3036 kB

VmallocChunk:   242108 kB

rocky:/proc# 

I don't understand, though, why I see only 4 GB of memory while I actually have 8. I guess I'll have to upgrade to the latest version but ... that's another episode :-)

thanks everybody and best regards

Paolo

2016-02-11 0:02 GMT+01:00 <BiggRanger@tds.net>:

Looking at the pads by the 24, I don't believe anything was ever soldered onto those pads. Double check the motherboard again for empty pads, and post pictures. You might also want to inspect the PCB's on the hard drives for evidence of missing caps. And any other cards that may be in the computer.

Darren Clark

On 2/10/2016 3:50 PM, Paolo Borsa wrote:

Hello HPPA community, and forgive me for this off-topic, but I really don't know where to ask.

I have an HP C3750, and today I was moving it from the garage to a (hopefully) stable and operative position.
While moving it, I heard clicking inside it. I opened and found a tantalum capacitor loose. (photo https://drive.google.com/open?id=1l2YQZoiqVUVnl86-GgWdhghdLfpNEcwneQ ). I checked the mother board, and I suspect it detached from the position "24" on the centre left of the photo https://drive.google.com/open?id=1nKsaqQWNHBItPKLusSSTFgCYB4jNI2JQOA next to the right of that big unpopulated connector 3 x 12.

If anybody have an HP C3750, would be so kind to check if in that position there is, or not, that capacitor I found loose, and with what polarity (where is the darker band)?

Thank you all very much and sorry again for the off topic.

best regards

Paolo