Digest for sci.electronics.repair@googlegroups.com - 10 updates in 6 topics

captainvideo462009@gmail.com: Jan 23 07:42AM -0800

I installed this unit for a friend about 12 years ago. It is a windows based 8 channel security type DVR. It uses XP as an operating system. This was made by Speco. They no longer support it. My buddy said that it started to become intermittent.
 
It had about 14 bulged electroltics on the mother board. It was a job but I managed to remove and replace them all, (plated through holes). Also the insulation on the IDE cable that connects the CDrom to the mother board was flaking off and it looked like some of the wires in the cable could have been shorting to each other or perhaps ground. I replaced the cable also.
 
After the machine has been off for a few days initially I get the following blue screen:
 
"A problem has been detected and Windows has been shut down to prevent damage to your computer. If this is the first time you have seen this stop error screen restart your computer. If this screen appears again follow these steps: Check for viruses on your computer. Remove any newly installed hard drives or hard drive controllers.Check your hard drive to make sure that it is properly configured and terminated. Run CHKDSK/F to check for hard drive corruption and then restart your computer.
 
Technical information:
OX0000007B (OXFA2C3640, OXC0000534, 0X00000000, 0X00000000).
 
I don't know what this "Technical information" means, bit if I shut down as it says and then reboot, the unit seems to "sort of" boot, and as it's booting when the Windows logo comes up briefly it says "Windows Embedded" whatever that means. It progresses and eventually shows the following message:
 
"Low disk space.You are running very low on disk space, DiSS (C:). To free space on this drive by deleting old or unnecessary files, click here". I click that and I get the following message:
 
"Windows cannot locate the disk cleanup program. The file may be corrupted or may have been deleted from your computer. To reinstall disk cleanup run windows setup again".
If you ignore this message the machine goes on to eventually boot to a screen that shows a "control panel" with a grid of 4 video monitors showing. The mouse moves but will not select anything to change what is presented. There is no video supplied for this test.
 
My son loaned me a couple of old XP discs that he had. One lets me get into a screen with choices that you can make but it apparently goes nowhere. The other does not seem to work at all. If this unit originally came supplied with a disk it is nowhere to be found.
 
This machine was never connected to the Internet so I can't imagine that it could have a virus. Also there was no replacement or additions to any hardware, so that could not be an issue. I was hoping that perhaps some of you computer savvy guys might have some suggestions for me. My friend doesn't have a lot of money and truthfully I really hate to give up on this thing at this stage of the game. I've come so far and now I feel like I may be so close. I apologize for the long winded post but I wanted to present all the information. Thanks for any assistance. Lenny
Adrian Caspersz <email@here.invalid>: Jan 23 04:37PM

On 23/01/17 15:42, captainvideo462009@gmail.com wrote:
I was
> the game. I've come so far and now I feel like I may be so close. I
> apologize for the long winded post but I wanted to present all the
> information. Thanks for any assistance. Lenny
 
Keep any consumer XP CDs well away from this, you don't want to install
a new OS! There will be specific driver files and applications for the
hardware that you won't want to lose.
 
OX0000007B is 'inaccesible boot volume'. Your HD is close to end of
life, I guess.
 
Get that drive out and backup a whole disk image of it. Plenty of tools
around for this.
Install a new hard disk and restore the image. If this is a larger
drive, you could resize the partition.
Otherwise do a manual disc clean up. Probably some adhoc video files
have been created than you can delete.
 
--
Adrian C
teryone99@gmail.com: Jan 23 05:59AM -0800

Hie. Did you find it. Im also looking for the same part. KM/EX-E2-HF
teryone99@gmail.com: Jan 23 05:59AM -0800

Hie. Did you find it. Im also looking for the same part. KM/EX-E2-HF
teryone99@gmail.com: Jan 23 05:59AM -0800

Hie. Did you find it. Im also looking for the same part. KM/EX-E2-HF
"Percival P. Cassidy" <Nobody@NotMyISP.net>: Jan 22 03:25PM -0500

On 01/22/2017 11:00 AM, Ancel UnfetteredOne wrote:
 
 
>> Is it worth replacing the battery just in case, or is this thing ready
>> for the recyclers?
 
> I usually slap on a used auto battery with cable extension to get a couple hours backup on my PC.
 
A few years back I read that one should not do this with consumer-grade
UPSes because they have no cooling and are designed so that during the
short time the standard battery lasts they will not reach an unsafe
temperature.
 
Anyway, I replaced the battery by a used one from another UPS, and all
seems to be fine.
 
Perce
bud-- <null@void.com>: Jan 22 01:35PM -0600

On 1/10/2017 10:09 AM, Ralph Mowery wrote:
> to be noticed when there is probaly over 50 feet of cheep wire from the
> socket to the breaker box of the house and hard telling how many miles
> of even cheaper made wire to the power company.
 
For the definitive answer from an electrical engineer, see the answer by
Bill Shymanski
https://groups.google.com/forum/?hl=en#!topic/alt.engineering.electrical/eWXk4BjP-rM
bud-- <null@void.com>: Jan 22 01:40PM -0600

On 1/7/2017 10:24 PM, isw wrote:
> to learn the new techniques and so on that were mandatory to install the
> stuff safely. It was only when it was installed just like Cu that it was
> prone to overheating.
 
The problem is only for 15 and 20 amp branch circuits. Larger wire is
used often without problems.
 
Around 1965 the price of copper went through the roof and aluminum
started to be used on 15 and 20A circuits. Failed connections and fires
resulted, and in 1971 UL pulled the listing on that aluminum wire and
the aluminum rating for devices like switches and receptacles. New
standards soon followed. The new aluminum wire was harder, and devices
had a CO/ALR (Revised) rating.
 
The CPSC had extensive testing done on aluminum connections. That
testing found that the aluminum oxide surface insulating layer caused
much of the problem - the actual metal-metal contact could be quite
small. Installations done "properly" could still fail. The probability
of a failure was just higher for aluminum than copper. Even though
there is a new alloy, most of the wire actually installed is the "old
technology" stuff. "Backstab" device connections were never listed for
use with aluminum.
 
If someone is working with this 15 & 20A wire there is a good paper on
connections at:
http://www.kinginnovation.com/pdfs/ReducingFire070706.pdf
It is written by the engineer that supervised the testing for the CPSC.
Use of antioxide pastes is generally recommended.
 
The best connectors are
http://www.kinginnovation.com/products/electrical-products/alumiconn/
They have a screw connection that likely breaks through surface oxides.
(Connections for large wires also deform the wire.)
Jon Elson <elson@pico-systems.com>: Jan 22 01:02PM -0600


> And if you want, some junk yards and metal recyclers have a
> we-buy-all-appliances policy. Call today.
No way! I spent SERIOUS money for this thing, and intend to wear it out.
I've already replaced the main bearing/seal assembly once, and the drain
pump once. Now that some of the kids have moved out, it only runs one shift
a day, so ought to last a bit longer before major overhauls.
 
Jon
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>: Jan 22 11:54AM -0500

On 01/20/2017 07:14 PM, Michael Black wrote:
> hobbyist will use copper foil, while for churches, it's something more
> substantial.
 
> Michael
 
I grew up in a house with leaded glass windows, and it was really just
lead--I had to replace a pane or two, which I did with a knife and some
JB Weld or Devcon putty.
 
Cheers
 
Phil Hobbs
 
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics
 
160 North State Road #203
Briarcliff Manor NY 10510
 
hobbs at electrooptical dot net
http://electrooptical.net
You received this digest because you're subscribed to updates for this group. You can change your settings on the group membership page.
To unsubscribe from this group and stop receiving emails from it send an email to sci.electronics.repair+unsubscribe@googlegroups.com.

No Response to "Digest for sci.electronics.repair@googlegroups.com - 10 updates in 6 topics"

Post a Comment