I have a Powerspec B639 desktop that has a bad motherboard.
Runs Win 7 Pro

Seems that the video portion has gone bad and is shorting out the PS.

PS resets after a brief powerdown. (not original PS, installed a better
one)

So looking for one of the following

a replacement motherboard that has Win 7 Pro drivers.
this is a must as I cannot go to a later Windows OS !

a way to disconnect power on the MB going to the on-board video so I can try a plug in video card that I have and has Win 7 drivers.

any other suggestions appreciated.

Thanks !

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In article <v5kfhgtfrvd35m440taot897rl8l2rs1q4@4ax.com>,
legg@nospam.magma.ca says...

a way to disconnect power on the MB going to the on-board video so I >can try a plug in video card that I have and has Win 7 drivers.

any other suggestions appreciated.

Thanks !

The OS drivers are on the HDD.

Just replace the motherboard with a close rev and
be prepared to reset the bios settings at start-up
to the default values at least once, before inputing
your own changes and preferences on a later boot
cycle

Probably just as cheap to get a whole used computer off ebay . I did
see one of the ones like that without the hard drive for about $ 100
shipped.

As I do not need 'gameing speed' I have bought about 5 or 6 refurbished computers off ebay over the last 10 years. All but one is still working
fine. Some were bought just to get a slightly faster computer with Win
10 on them because Turbo Tax quit working on other systems.

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On Fri, 13 Aug 2021 11:58:35 -0700, Jerry <Jerry@JerryThinks.com>
wrote:

I have a Powerspec B639 desktop that has a bad motherboard.
Runs Win 7 Pro

Seems that the video portion has gone bad and is shorting out the PS.

PS resets after a brief powerdown. (not original PS, installed a better
one)

So looking for one of the following

a replacement motherboard that has Win 7 Pro drivers.
this is a must as I cannot go to a later Windows OS !

a way to disconnect power on the MB going to the on-board video so I
can try a plug in video card that I have and has Win 7 drivers.

any other suggestions appreciated.

Thanks !

The OS drivers are on the HDD.

Just replace the motherboard with a close rev and
be prepared to reset the bios settings at start-up
to the default values at least once, before inputing
your own changes and preferences on a later boot
cycle.

The default start-up settings will make sure that any
board enhancements are recognized by the operating
system.

If the MB bios is older than on your previous MB, you
may consider reflashing it to a more current rev, but
unlikely on products mfred after ~2008.

RL

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On Sat, 14 Aug 2021 10:48:46 -0400, Ralph Mowery
<rmowery42@charter.net> wrote:

In article <v5kfhgtfrvd35m440taot897rl8l2rs1q4@4ax.com>,
legg@nospam.magma.ca says...

a way to disconnect power on the MB going to the on-board video so I

can try a plug in video card that I have and has Win 7 drivers.

any other suggestions appreciated.

Thanks !

The OS drivers are on the HDD.

Just replace the motherboard with a close rev and
be prepared to reset the bios settings at start-up
to the default values at least once, before inputing
your own changes and preferences on a later boot
cycle

Probably just as cheap to get a whole used computer off ebay . I did
see one of the ones like that without the hard drive for about $ 100
shipped.

As I do not need 'gameing speed' I have bought about 5 or 6 refurbished >computers off ebay over the last 10 years. All but one is still working
fine. Some were bought just to get a slightly faster computer with Win
10 on them because Turbo Tax quit working on other systems.

Motherboard alone sells and ships more economically. You don't even
need the processor, as the old one will fit.

If you buy the whole PC, it means scrapping your old one.

I've bought and replaced a few motherboards without incident.

RL

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In article <nnlghgt3pn8rr0l5nmc1o6u3tp7j60p9nt@4ax.com>,
legg@nospam.magma.ca says...

Motherboard alone sells and ships more economically. You don't even
need the processor, as the old one will fit.

If you buy the whole PC, it means scrapping your old one.

I've bought and replaced a few motherboards without incident.

I agree with that except it is often very difficult to find just an old motherboard.

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On Sat, 14 Aug 2021 19:55:40 -0400, legg <legg@nospam.magma.ca> wrote:

Motherboard alone sells and ships more economically. You don't even
need the processor, as the old one will fit.

If you buy the whole PC, it means scrapping your old one.

I've bought and replaced a few motherboards without incident.

RL

I prefer to sell the customer an upgraded machine, but have replaced motherboards with those found on eBay with good success. It's
especially handy for odd situations like this HP Elite 800 mini-tower
with a BIOS problem.
<https://photos.app.goo.gl/UrXVFyLVvnncBMrq9>
It's the monster case on the far right. The machine worked (after
some minor repairs). However, the previous repairman decided to
update the BIOS to the latest greatest. That turned out to be a
mistake because the updated HP BIOS created all kinds of weird
problems and could not be downgraded to the previous version due to
alleged "security reasons". I agreed to look at the problem but was
unable to make any more progress than the previous repair attempts. I
was ready to scrap the machine for useful parts, when I though that
perhaps a replacement motherboard might fix the problem. I found one
on eBay with an older BIOS for about $35. All the BIOS related
problems disappeared when the old motherboard was replaced. Windoze
10 wasn't happy and wanted a new activation code, but that was solved
by my passing a typing test provided by Microsoft. <https://support.microsoft.com/en-us/windows/reactivating-windows-10-after-a-hardware-change-2c0e962a-f04c-145b-6ead-fb3fc72b6665>

Unfortunately, the original owner found a better, faster, smaller, and
more capable replacement machine and does not want the HP Elite 800
monster case back. So, I'm stuck with it. I'll probably donate it to
a local impoverished student or senior.

One more example. One of my customers has Dell GX620 he wanted fixed.
I didn't have time and suspected that something on the motherboard was
cooked (because the case fan had stopped). So, I ordered a
replacement motherboard for $40:
<https://www.ebay.com/itm/143971853748>
It took me about a hour to replace (mostly cleaning) the motherboard,
which worked just fine and didn't cost much to repair.




--
Jeff Liebermann jeffl@cruzio.com
PO Box 272 http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann AE6KS 831-336-2558

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In article <jfdihg1ao7nhhmhb3l3u8qm1nf4p01ghp1@4ax.com>,
jeffl@cruzio.com says...

One more example. One of my customers has Dell GX620 he wanted fixed.
I didn't have time and suspected that something on the motherboard was
cooked (because the case fan had stopped). So, I ordered a
replacement motherboard for $40:
<https://www.ebay.com/itm/143971853748>
It took me about a hour to replace (mostly cleaning) the motherboard,
which worked just fine and didn't cost much to repair.

So you had to get your $ 40 back for the mother board and charge the
customer arund $ 100 to replace it. He could probably get a refurbished
one off ebay for the same price.

I guess he would have to reload everything off his hard drive so maybe
for him the price is worth it to just get another motherboard.

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On Sun, 15 Aug 2021 12:36:39 -0400, Ralph Mowery
<rmowery42@charter.net> wrote:

In article <jfdihg1ao7nhhmhb3l3u8qm1nf4p01ghp1@4ax.com>,
jeffl@cruzio.com says...

One more example. One of my customers has Dell GX620 he wanted fixed.
I didn't have time and suspected that something on the motherboard was
cooked (because the case fan had stopped). So, I ordered a
replacement motherboard for $40:
<https://www.ebay.com/itm/143971853748>
It took me about a hour to replace (mostly cleaning) the motherboard,
which worked just fine and didn't cost much to repair.

So you had to get your $ 40 back for the mother board and charge the >customer arund $ 100 to replace it. He could probably get a refurbished
one off ebay for the same price.

I guess he would have to reload everything off his hard drive so maybe
for him the price is worth it to just get another motherboard.

He would not be doing any software reloading. The various software
vendors would charge him to have someone do it online using remote
control software, or I would end up doing it. For the operating
system and network setup, I would be doing the work. Going from an
old XP machine to a new Win 10 machine is not easy and does take some
time.

The customer is the auto shop where my car (Subaru 2001 Forester L)
was getting a new drive shaft. Don't ask what happened. The Dell
GX620 SFF computer ran Windoze XP and was used mostly for looking up
vehicle parts, instructions, procedures, specs, etc and running
various engine analyzers. There were other computers available that
could do all this, but this one was in a convenient location. After I
was sure that the computer had a motherboard problem, I discussed
various options with the owner. We both wanted a new and better
replacement, but I didn't have time to do much more than a quick fix.
So, I recommenced a quick fix in the form of a new motherboard. If it
didn't work, we go shopping for a replacement. I paid for expedited
shipping and had it fixed 4 days later. The old machine was somewhat functional during the 4 days as long as it was allowed to cool down
between lookups. Eventually, the machine will be replaced with
something better, but for now, getting it back in operation without
reloading old software and dealing with a possible XP VM (virtual
machine) to run the old software made the motherboard replacement a
good idea. Since they gave me a good price on the drive shaft work, I
don't plan to bill them for the $40 or the 1.5 hr labor needed to do
the computer work.



--
Jeff Liebermann jeffl@cruzio.com
PO Box 272 http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann AE6KS 831-336-2558

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