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This topic comprises 2 pages: 1 2
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Topic: DSS200 sudden shut-off
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Leo Enticknap
Film God
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Posts: 7474
From: Loma Linda, CA
Registered: Jul 2000
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posted 10-02-2018 06:06 PM
As Dave points out, if the motherboard suddenly loses power and dies, no log entry will be created to record that fact. All that you'll see are the bootup entries that were created when the server was restarted.
quote: Dave Macaulay With redundant supplies weird things can happen with bad connections or when one is flaky: make sure the server runs OK with both when used alone.
I found this out through trial and error with a Doremi Showvault recently. The fault reported was that it was reluctant to start, and that the button had to be pressed three or four times before it eventually did (this was a multi-use venue that only showed movies 2-3 times a week, and shut down the server when it wasn't in use).
By the time I got there, it wouldn't start at all with both PSUs in place. The LED on one was totally out, and the other was flickering amber. With the former completely out of the chassis, and the latter moved into the other slot, the server booted. But it wouldn't with any other configuration of the PSUs.
Needless to say, we replaced both of them, but that temporary arrangement was enough to get them through the wait for the new ones to arrive.
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Ioannis Syrogiannis
Expert Film Handler
Posts: 147
From: Reykjavík, Iceland
Registered: Jun 2005
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posted 10-03-2018 04:13 AM
Should we assume that by shutting off, we mean rebooting, given that it is a DSS200 and when there is power supply, it is on? (Except for the cases that the BIOS settings has gone bad.)
UPS is always a good idea, PSU is always a good guess. If none of the above work for you, try checking the memory modules. And if your fellow projectionist have time, propose to him to burn a live CD with MemTest86, run the short test and afterwards let it run the extended one. We have to acknowledge here that if the issue (shutting off) appears in the midst of the test, it could be some wasted time.
In any case, I've seen that in a DSS220 and chances are the problem may occur in a DSS200 also.
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Leo Enticknap
Film God
![](http://www.film-tech.com/ubbmembers/534a.jpg)
Posts: 7474
From: Loma Linda, CA
Registered: Jul 2000
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posted 10-03-2018 05:11 AM
Very good suggestion - testing the RAM. I've experienced several PCs (either mine, or those of co-workers, friends and relatives) throw completely random BSODs over the years, and the fault turned out to be with the RAM boards. So much so, in fact, that if someone comes to me complaining about this and I'm satisfied that the occurrences are truly random (e.g. not when a specific program was run, driver starts to be used, etc.), then the RAM is the first thing I'd suspect and investigate.
Usually, either heat cycling had compromised the connection (in one case I saw, one of the plastic clamps at the end of the slot had actually popped open), or a RAM board had actually gone bad, which MemTest86 revealed.
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Carsten Kurz
Film God
Posts: 4340
From: Cologne, NRW, Germany
Registered: Aug 2009
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posted 10-08-2018 11:47 AM
Seems this is getting more annoying. Before, they noticed their servers shut down during nights, unnoticed. Now, they are having show interruptions. Servers shutt off, and do not restart automatically. After they push the front-button, the server starts normally, and the show is able to proceed.
They just had a clean, new hard disc set install and current software install, but it seems the problem remains. I told them they should try swapping the power supplies, or, supplying only one of them with a cable alternately, to find out wether there is a pattern. Is there a way to power a DSS200 from a plain vanilla PC power supply (non-redundant, of course)?
- Carsten
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Ioannis Syrogiannis
Expert Film Handler
Posts: 147
From: Reykjavík, Iceland
Registered: Jun 2005
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posted 10-08-2018 05:05 PM
I can confirm that it can be done to power a DSS100. One will have to remove the connections from the PSUs backplane to the motherboard and peripherals and replace them with the ones from the "vanilla PC PSU". That's it. Of course, in order for that to happen, the top lid of the server will have to remain open. The common PC PSU does not fit into it. I had that done once, but only for troubleshooting and testing purposes and not in a cinema environment. At that particular period, with the PSUs in question being unavailable from Dolby, it was the only way to power up the server, and all worked fine. If I remember well, there weren't even any indications to point the difference on logs.
I can't see why one couldn't do the same on a DSS200. The difference here, of course, is that you have the 2x2ATX (yellow/black/12VDC) power supply to the cat.862 that I didn't have in the DSS100 due to DSP100 media block. Also, the 8pin (yellow/black/12VDC) connection just by the main motherboard one. So, I presume that the PSU should offer a number of connection modules to fill the powering needs.
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