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power shortcut! anyone has experience with this?
power entrance is shortcutted after plugging in under normal conditions

New Messagepower shortcut! anyone has experience with this? (modified 1 times) somersault
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Hello everybody,

I've always been 'leeching' on this board, many thanks for the sharing of your experiences and ideas to all.
Soon I'll finally have something to offer as well, if anyone's interested, a French version of Midori Linux with simplified configuration pages... nothing spectacular but if anyone needs it drop me a line at bhorsting@hotmail.com . supports the original & french layout keyboards.
For the first time I'm stuck with an I-Opener on a technical problem, and quite an annoying one, at that: after flashing the sandisk with another version of midori using a harddisk, I unplugged power as usual to get the harddisk off the IDE conn. (In case you wonder, I was fixing some network stuff, that's why I couldn't update it that way). When I plugged back in to test the installation, the power plug sparked inside the socket. The socket shows a complete shortcut, but there's nothing electrical (solder, stuff fallen in...) that could cause it...
Did anyone experience this, and does anyone know of possible electronic causes for it? I have the tools to repair it even if it's an SMD, with a bit of pacience. Thought of a burnt-through electrolytic cap, but the ones I see are in fine condition it seems.

It sounds cruel, but I hope someone went through the same trouble as me.......

Many thanks

Somersault

06-18-2003 15:22:03

New MessageRE:power shortcut! anyone has experience with this? (modified 0 times) Lincoln_man
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I don't know what your problem may be but to troubleshoot you need to know that
the power socket has a shorting bar in it that shorts the center to ground. When
the power plug is inserted it pushes the bar back. To test things out you need a
dummy plug not connected to a power supply or anything. It will push the shorting bar back and then you can measure the circuity.
Hope this helps.
06-18-2003 17:40:28

New MessageRE:power shortcut! anyone has experience with this? (modified 0 times) antman49443
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Somersault: I've been building/designing/fixing electronic gear as my main hobby for over 20 years. When I first read your post, my insticts said," Power connector plug first, electrolytic cap second." So I believe Lincoln_man is on the right trail. If that isn't it, I'd still check out any electrolytic caps on the power input. Just because they are shorted internally, doesn't mean they will necessarily show it. I've replaced my fair share of good-looking caps that were really bad news. But I'd really scrutinize that connector for sure.
06-19-2003 07:27:34

New Messageproblem solved! (modified 0 times) somersault
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Thanks for your replies!

Problem solved!put a another lamp on my worktable and discovered some metallic dust on, actually, the leads of the yamaha sound chip....but anyway that made me think that during the process of getting the epoxy off the bios chip with the dremel, which also scraped a little metal off the chip's contacts, even though I cleaned well, I didn't do a good enough job... so I cleaned the whole board again and there it was alive again! Will never know where the short circuit resided, whether it was a pure 19V short or the power supply not starting up, only know it's gone...
Sometimes repairing things is so easy... know that experience?

Thanks again,

Somersault

06-20-2003 17:36:22

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