EEVblog > Suggestions

Blog suggestion. Repair of the odd random Ebay "untested" purchase.

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Chris Wilson:
I would love to see a few blogs on how to tackle repairs of those Ebay buys we all love, where the thing is sold "untested", or with the less legally couched "not working" description. Perhaps something basic like a dead multimeter, and something more complex like a dead or dysfunctional analogue oscilloscope? The blog could show the best way to isolate the area(s) of trouble, safe testing procedures, for the device and the tester, and the most effective and efficient ways to test to find the problem(s). Even if the ultimate repair was impossible or financially not viable it would, I feel, make compelling viewing for many of us. Thanks.

grumpydoc:
Is it just me or does everyone else translate "untested" into "not working" anyway? Years ago when I used to frequent radio rallies (must start going again, though I understand they aren't what they once were - Elvaston Castle will be missed) there always seemed to be the "tested and working" pile and the "untested" pile - oddly there was never a "tested and not working" pile  :-/

Mashpriborintorg:
According to my experience, buying untested stuff is just like playing russian roulette. You can get real pieces of junk (as water damaged stuff), and real bargains, when the seller didn't test the item by lack of knowledge, lack of means or... simply because of a missing power cord !

Psi:
It depends if the item is really "untested" or if the seller knows it's stuffed and puts "untested" on the auction to try and sell it.
The main problem you run into is when an item has already been taken to bits and all good parts removed.

grumpydoc:

--- Quote ---It depends if the items is really "untested" or if the seller knows it's stuffed and puts "untested" on the auction to try and sell it.
--- End quote ---
That, er...., is my point entirely.

Edit: Actually, being fair there are businesses that deal in surplus stuff that genuinely might get hold of a sufficiently large batch of items that they just want to move them on, but I still tend to view "untested" to mean we tried it and it didn't work.

To get back on topic I'd be interested to see more repair/restoration threads but I'm not sure what would be of most general appeal. One thing I've noticed as well is that "For Parts or Not Working" items on Ebay often go for worryingly close to those for working items. A Yamaha DGX-520 keyboard that I'd spotted and was interested in when it was a tenner ultimately went for £80 despite being totally dead. A working one only went for £100.

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