> If yours is dead, a bad power supply is the most likely issue. The same > power supply was used in the 9000/340 but the 340's service manual doesn’t > tell you much about the internals of the supply. The 345 service manual > tells you more but the supply for that box is a different model.
I had a 9000/375 that would not start a couple of years ago - I think that there was a coin cell on the motherboard - once this was replaced, the machine booted fine. Peter ________________________________ From: Josh Dersch <dersc...@gmail.com> Sent: 18 July 2017 03:42 To: Curator Cc: General Discussion: On-Topic and Off-Topic Posts; Lee Courtney; Lee Courtney Subject: Re: HP 300-series boot rom archive? On Mon, Jul 17, 2017 at 8:13 PM, Curator <cura...@hpmuseum.net> wrote: > I have to agree with Lee's view on the HP300... THIS is an HP300... > http://www.hpmuseum.net/display_item.php?hw=116 HP Computer Museum<http://www.hpmuseum.net/display_item.php?hw=116> www.hpmuseum.net Description: The HP 300 was an integrated multi-user computer that supported up to 16 attached terminals. The all-in-one box included processing hardware, a 12 MB ... Yep yep, I replied to Lee (thought I'd replied to the list, apparently I don't know how that works anymore) and apologized for not being specific enough :). > > > Now for the HP9000/375 - I've not seen a service manual for the 375 but > here's a link to the Service Handbook. > > http://www.hpmuseum.net/document.php?hwfile=2053 > > There's a list of hardware related documents in that handbook but there's > no mention of a Service Manual. Perhaps it was an unlisted HP internal > document - but the handbook looks like it has enough for the typical field > repair efforts of its era.. > Yep, I found that one, but it's not useful for actually repairing anything beyond basic board-swapping. > > If yours is dead, a bad power supply is the most likely issue. The same > power supply was used in the 9000/340 but the 340's service manual doesn’t > tell you much about the internals of the supply. The 345 service manual > tells you more but the supply for that box is a different model. > It's not the supply, I've tested the supply, and I've tested the board in known-working chassis and it behaves identically (all diagnostic LEDs on, a buzz coming from the speaker, similar to the short one you normally hear at power-up, but forever.) It seems like it's probably not coming out of reset but that's just a guess. Thanks! Josh > > The supply was most likely sourced from a third party so you might have to > hunt around for an OEM part number on the unit and maybe get lucky with > schematics on the web. Otherwise standard troubleshooting tasks for switch > mode power supplies would apply.. http://www.repairfaq.org/sam/ > smpsfaq.htm#smpssctos > > David Collins > HP Computer Museum > > -----Original Message----- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Lee > Courtney via cctalk > Sent: Monday, 17 July 2017 4:36 PM > To: Josh Dersch <dersc...@gmail.com>; General Discussion: On-Topic and > Off-Topic Posts <cctalk@classiccmp.org> > Subject: Re: HP 300-series boot rom archive? > > Hi Josh, > > "lot of HP 300 gear" > > Being picky here, but I worked at HP in the HP 300 days and the system you > acquired does not sound like an HP 300, aka Amigo ( > https://en.wikipedia.org/wiki/HP_300), but rather a model of HP 9000 > desktop machines (M68K based?). > > Lee C. > > On Sun, Jul 16, 2017 at 7:50 PM, Josh Dersch via cctalk < > cctalk@classiccmp.org> wrote: > > > Hi all -- > > > > I picked up a small lot of HP 300 gear yesterday and I'm working on > > getting them going. In particular, I have a 9000/350 that I'd like to > > use but it has what appears to be a very early boot ROM (dated 7/9/87, > > version > > A2) and it doesn't recognize the 98658 SCSI controller I'd like to use > > in it -- it enumerates as "127 at 14" rather than getting a the usual > > identification. I'm hoping that later revisions might support this card. > > (I lack functioning HP-IB storage at the moment). Is there an archive > > of ROM images for the 300 series anywhere? Anyone have a 350 with a > > later boot ROM they can image for me? > > > > (Also, if anyone has a real service manual for the 9000/375, drop me a > > line -- I have one that's stone dead...) > > > > Thanks as always, > > > > Josh > > > > > > > -- > Lee Courtney > +1-650-704-3934 cell > >
