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fjk61011
July 13th, 2017, 08:19 AM
I bought a 32 Mb Disk on Module for a Lo-tech XT-Ide in a 5150.

It wouldn't work in the 5150 so I put it on a Future Domain Controller in a 486. When I switched on, the power leads went up in smoke.

I bought it from China. It is a Transcend DOM.

I contacted the seller and he offered a replacement or a full refund. I took the refund.

glitch
July 13th, 2017, 08:55 AM
It probably has a Transcend sticker on the outside. I know a lot of people have had success with KingWin or Trusty Dragon or Winking Fox or whatever name(s) you can purchase from China, but events like this are why I stick to major industrial suppliers.

fjk61011
July 13th, 2017, 09:06 AM
It probably has a Transcend sticker on the outside. I know a lot of people have had success with KingWin or Trusty Dragon or Winking Fox or whatever name(s) you can purchase from China, but events like this are why I stick to major industrial suppliers.

I'm glad I was there when it happened. I shudder to think what might have happened if I wasn't.

Stone
July 13th, 2017, 09:13 AM
I'm glad I was there when it happened. I shudder to think what might have happened if I wasn't.How could you not be there when you switched it on??? :-) :-) :-)

fjk61011
July 13th, 2017, 09:47 AM
How could you not be there when you switched it on??? :-) :-) :-)

True but it might not have happened straight away.

Chuck(G)
July 13th, 2017, 10:07 AM
I bought a 32 Mb Disk on Module for a Lo-tech XT-Ide in a 5150.

It wouldn't work in the 5150 so I put it on a Future Domain Controller in a 486. When I switched on, the power leads went up in smoke.


It didn't short out the 5150 +5 supply? Curious...

fjk61011
July 13th, 2017, 10:19 AM
It didn't short out the 5150 +5 supply? Curious...

Nothing happened in the 5150.

Chuck(G)
July 13th, 2017, 10:27 AM
Nothing...as in nothing, not even a display, beep? Well, a shorted module would account for that...

Malc
July 13th, 2017, 10:42 AM
I bought a 32 Mb Disk on Module for a Lo-tech XT-Ide in a 5150.

It wouldn't work in the 5150 so I put it on a Future Domain Controller in a 486. When I switched on, the power leads went up in smoke.

I bought it from China. It is a Transcend DOM.

I contacted the seller and he offered a replacement or a full refund. I took the refund.

Wasn't one of those cheapo "Used" or "Seller Refurbished" jobbies was it ?

fjk61011
July 13th, 2017, 11:05 AM
Nothing...as in nothing, not even a display, beep? Well, a shorted module would account for that...

I think it posted and then stopped.

fjk61011
July 13th, 2017, 11:06 AM
Wasn't one of those cheapo "Used" or "Seller Refurbished" jobbies was it ?

Never said. He was quick enough to offer a refund. Makes me think it wasn't the first time it happened.

Dwight Elvey
July 13th, 2017, 01:24 PM
Which wires fried?
One never knows as to what really smoked them.
Years ago, while working for Intel, we used to get power
supplies with the chassis ground connected directly to
the hot wire coming in.
It was a well known power supply company in Camarillo, Ca.
We'd send them back. Over time it was hitting 30% failing.
We started to look at serial number logs and sure enough,
they were the supplies we'd sent them.
It seems they used a HiPot transformer isolation when testing the
supplies. This was for safety reasons in case the supplies had a short
in them to the AC.
Their testers were safe and we got the dangerous supplies.
Went we told them the problem, their first response was, it
was something we where doing to the supplies. ( why do suppliers
always assume it is the customer who is at fault? )
We asked them to simply test their supplies with an ohm meter.
Then it was, well get to the bottom of this right away.
It was a miss-wiring, by them of course.
We added to our test to look for it before going to the main tester.
All supplied spent several hours in the coffin test where it
was in a safe place to find inverted main capacitors. Part of the
sequence was to look for AC where it wasn't suppose to be. Some
of these cans would go ballistic and be contained in the coffin.
Dwight

fjk61011
July 13th, 2017, 02:16 PM
Which wires fried?
One never knows as to what really smoked them.
Years ago, while working for Intel, we used to get power
supplies with the chassis ground connected directly to
the hot wire coming in.
It was a well known power supply company in Camarillo, Ca.
We'd send them back. Over time it was hitting 30% failing.
We started to look at serial number logs and sure enough,
they were the supplies we'd sent them.
It seems they used a HiPot transformer isolation when testing the
supplies. This was for safety reasons in case the supplies had a short
in them to the AC.
Their testers were safe and we got the dangerous supplies.
Went we told them the problem, their first response was, it
was something we where doing to the supplies. ( why do suppliers
always assume it is the customer who is at fault? )
We asked them to simply test their supplies with an ohm meter.
Then it was, well get to the bottom of this right away.
It was a miss-wiring, by them of course.
We added to our test to look for it before going to the main tester.
All supplied spent several hours in the coffin test where it
was in a safe place to find inverted main capacitors. Part of the
sequence was to look for AC where it wasn't suppose to be. Some
of these cans would go ballistic and be contained in the coffin.
Dwight


It was the thin wires of the DOM. I'll check the power supply tomorrow.

KC9UDX
July 13th, 2017, 02:37 PM
You're very lucky to get a refund. Every time I've had this sort of problem, I was offered to ship the item to an unspecified place on China (a bluff) where they'd supposedly evaluate it and send a new one after I paid shipping again.

glitch
July 13th, 2017, 03:16 PM
You're very lucky to get a refund. Every time I've had this sort of problem, I was offered to ship the item to an unspecified place on China (a bluff) where they'd supposedly evaluate it and send a new one after I paid shipping again.

Most of the cheap Chinese junk I've had fail resulted in an insta-refund. I did once have them send me more (also counterfeit) ICs as some sort of consolation gift or something.

Stone
July 13th, 2017, 03:23 PM
You're very lucky to get a refund. Every time I've had this sort of problem, I was offered to ship the item to an unspecified place on China (a bluff) where they'd supposedly evaluate it and send a new one after I paid shipping again.They must somehow know that you're an easy mark. (I didn't tell them.) :-)


Most of the cheap Chinese junk I've had fail resulted in an insta-refund.All the bad items I've gotten from there were refunded immediately and without any questions.

KC9UDX
July 13th, 2017, 05:19 PM
After some thought, I was wrong; it wasn't every time. There was one time that I got a refund, and a new, working one shipped unexpectedly.

Chuck(G)
July 13th, 2017, 06:11 PM
I've occasionally gotten two of stuff from China when I ordered one. Not charged for the second one. On one occasion, I thought to write the seller that he'd shipped me an extra one, whereupon he offered to ship me yet another.

fjk61011
July 13th, 2017, 11:24 PM
i've occasionally gotten two of stuff from china when i ordered one. Not charged for the second one. On one occasion, i thought to write the seller that he'd shipped me an extra one, whereupon he offered to ship me yet another.

:) :d :)

fjk61011
July 13th, 2017, 11:26 PM
You're very lucky to get a refund. Every time I've had this sort of problem, I was offered to ship the item to an unspecified place on China (a bluff) where they'd supposedly evaluate it and send a new one after I paid shipping again.

Refund is in my PayPal account now.

konc
July 13th, 2017, 11:49 PM
"Kingspec", another Chinese DOM brand, has been proved reliable.