Toddy wrote:
My trusty 18 year old GE just shot craps. It beeps and junk on the display
and I also found a reference to my problem in the EURAS database, but they
want me to pay for the info. It beeps and kinda freaks out. The boards in it
appear fine, no cold solder joints or burned components. I found a small
sheet of diagnostics inside the case, and the only thing I tested was the
TRIAC, and it reads 50ohms not the 70 listed on the sheet. Other than that,
I don't know much! What I found was this:

http://www.service-werkstatt.de/repa...2800001_Ge.htm

It's a Model JE2800-001, any help appreciated. Please copy me via email if
you have an idea of what to try.

Todd

What I would suggest first is to replace all of the electrolytic
capacitors on the smart board. They may be black, green, blue, etc.,
and look like those seen in the photo he
http://www.sparkfun.com/shop/images/163.jpg

What happens is that the electrolytic (liquid) wears out, changes pH
level, or dries out over time, and they stop filtering the rectified DC
voltage from the power supply. The fluctuations (noise) that get
through will drive ICs crazy! New caps may fix this for you.

To get the replacements needed, you can visit Tritronics at
http://www.wehaveparts.com/index.cgi...ectrolytic.htm

Be sure the value of the caps you order is the same. Voltage can be a
step higher. These are all 105-degree caps, and very good, too. Be sure
the plus-minus polarity is the same when you install the new ones or
they can actually pop and take off like little rockets! Safety first!

Also, I would recommend resoldering and if possible actually testing
any parts which are burned or which have darkened spots under them on
the circuit board. Big transistors and resistors are your first
suspects. They can desolder themselves over time as the solder
experiences metal fatigue from the heat.

Lastly, look for brown glue (goo) used to hold components down before
they were machine soldered during manufacturing. This glue can become
conductive over the years, causing odd and aggrivating problems.

Still need help? I fix microwave control panels for only $32.50 in most
cases. See http://www.MicrowaveDisplay.com for details.

Good luck, and observe safety rules (such as those at
http://www.gallawa.com/microtech/safety.html)!