Hardware test in 1.5 reports temperature rise of 9 or 10 C.
Hi, The 1.5 here is S/N SHC10400772 OpenFirmware Q3C17 EC Firmware Ver:2.2.10. In the hardware test, a temperature rise of 9-10 C is reported. I found a thread in the mailing list at 2011-2012. Appears hardware revision might have continued then. I haven't found a description of a repair. I have no trouble dismantling the machine and performing a small modification or repair. Before diving in, I am interested in advice and lore. Aside from this thermal problem, the machine appears to run as well as when it left the factory. Thanks! ... Peter E. -- https://en.wikibooks.org/wiki/Medical_Machines https://en.wikibooks.org/wiki/Oberon Tel: +1 604 670 0140Bcc: peter at easthope. ca ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Hardware test in 1.5 reports temperature rise of 9 or 10 C.
Hi, P.s. This is SKU 133, D5. Present in http://wiki.laptop.org/go/Manufacturing_data . The 1.5 D5 here is S/N SHC10400772 OpenFirmware Q3C17 EC Firmware Ver:2.2.10. In the hardware test, a temperature rise of 9-10 C is reported. I found a thread in the mailing list at 2011-2012. Appears hardware revision might have continued then. I haven't found a description of a repair. I have no trouble dismantling the machine and performing a small modification or repair. Before diving in, I am interested in advice and lore. Aside from this thermal problem, the machine appears to run as well as when it left the factory. Thanks! ... Peter E. -- https://en.wikibooks.org/wiki/Medical_Machines https://en.wikibooks.org/wiki/Oberon Tel: +1 604 670 0140Bcc: peter at easthope. ca ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Hardware test in 1.5 reports temperature rise of 9 or 10 C.
Thanks, that's interesting. This serial number was produced in late January 2011, about 9.5 years ago. I would have expected it to fail much sooner. It has lasted well. The temperature rise test was only characterised for manufacturing and some accelerated aging tests. The test has no statistical meaning now. The test should be done at an ambient temperature of 21°C to avoid false positives. In my experience the most likely causes of the test failure are; - high ambient temperature due to season, - high internal temperature due to repeated testing, - missing or loose screws holding down the heat spreader, - dents in heat spreader due to impact, - age hardening of the silicone plastic thermal pad between the heat spreader and the CPU. I suggest ignoring the problem for now, as servicing may cause damage beyond economic repair. In particular for the CPU interposer board solder balls, which are under significant stress. On Mon, Aug 10, 2020 at 06:07:02AM -0700, pe...@easthope.ca wrote: > Hi, > > P.s. This is SKU 133, D5. > Present in http://wiki.laptop.org/go/Manufacturing_data . > > The 1.5 D5 here is S/N SHC10400772 OpenFirmware Q3C17 EC Firmware > Ver:2.2.10. > > In the hardware test, a temperature rise of 9-10 C is reported. > > I found a thread in the mailing list at 2011-2012. Appears hardware > revision might have continued then. I haven't found a description of > a repair. > > I have no trouble dismantling the machine and performing a small > modification or repair. Before diving in, I am interested in advice > and lore. > > Aside from this thermal problem, the machine appears to run as well as > when it left the factory. > > Thanks! ... Peter E. > > -- > https://en.wikibooks.org/wiki/Medical_Machines > https://en.wikibooks.org/wiki/Oberon > Tel: +1 604 670 0140Bcc: peter at easthope. ca > > ___ > Devel mailing list > Devel@lists.laptop.org > http://lists.laptop.org/listinfo/devel -- James Cameron http://quozl.netrek.org/ ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Hardware test in 1.5 reports temperature rise of 9 or 10 C.
From: James Cameron Date: Tue, 11 Aug 2020 07:21:17 +1000 > January 2011, about 9.5 years ago. I would have expected it to fail > much sooner. It has lasted well. Years ago, changed the internal SDHC to 8 GB. About a year ago, replaced the battery pack with a new one sent from Australia by Terry Gillett; thx Terry. Otherwise all original. Good reliable little machine; on a par with the VW Beetle. > The test should be done at an ambient temperature of 21°C to avoid > false positives. The test was done in the evening, temperature 20-25 C. Will try again and check the thermometer. > - missing or loose screws holding down the heat spreader, > > - dents in heat spreader due to impact, Unlikely in this machine. > - age hardening of the silicone plastic thermal pad between the heat > spreader and the CPU. The most likely factor here. > I suggest ignoring the problem for now, as servicing may cause damage > beyond economic repair. In particular for the CPU interposer board > solder balls, which are under significant stress. Will do. I'm contemplating to find a 1.75 on eBay. Possibly a new infinity. Not clear whether the proposed modularity of the Infinity was implemented in production. Also not clear whether the case is elastic polymer or hard polymer. Thx,... P. -- https://en.wikibooks.org/wiki/Medical_Machines https://en.wikibooks.org/wiki/Oberon Tel: +1 604 670 0140Bcc: peter at easthope. ca ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
