Microwave quit working after a few seconds......

Could you comment with the Make and Model of the microwave?On most Combination Microwaves, (The ones with oven grill and microwave functions), the Convection feature is usually a setting you have to select for it to work. So the obviously silly answer is to simply not select it.
Another option is to buy a more basic microwave that only has the microwave function.

I worked for a place that repairs appliances and rule of thumb is if a microwave sparks dont bother trying to fix it just replace it.Microwaves work with so many watts sparks could mean a resister is shot witch could be very dangerous and if it stopped functioning thats probably the case.

try unplugging it. or the probe might be defective. another trick is slamming the door when shutting it, if this works it;s a micro switch thats gone bad or out of alignment

Check the power setting it may be too high and are you useing microwave popcorn?you generally can not use standard popcorn in a microwave.The power setting required is on the bag of microwave popcorn

looks like the timer brain has packed up on you,,
how old is it,, it may be cheeper to just replace the microwave as there not very pricy now,,there is very little inside them that you could fix your self, however,, putting your hand inside the back could kill you? so dont try it, play safe buy a new microwave insted

GE
Microwave Fault Codes Failure
Code Condition Check/Repair F1 Open sensor, will occur below 190F of cavity temperature within 15 minutes after starting convection, combination or roast cook Check oven temperature sensor for continuity. Replace if zero or infinite ohms F2 Shorted thermal sensor, will occur if a shorted thermal sensor is detected continuously over 5 seconds on convection, combination or roast cooking Check oven temperature sensor for continuity. Replace if zero or infinite ohms

Note: It will take a minimum of 5 minutes of convection run time before F1 or F2 code will be displayed if the thermal sensor is shorted or open. F3 Shorted key panel (touch pad), will occur if a shorted key panel is detected continuously over 60 seconds Replace key panel (touch pad) F4 Open humidity sensor, will occur if humidity sensor is detected as being open continuously over 5 seconds Replace humidity sensor F5 Shorted humidity sensor, will occur if humidity sensor is detected as being shorted continuously over 5 seconds Replace humidity sensor F6 Shorted temperature probe, will occur if temperature probe is detected as shorted continuously over 5 seconds Replace temperature probe ProbEe Open temperature probe, will occur if temperature probe is detected open, or not plugged into the receptacle If probe is plugged in and "ProbE" is on display check continuity of the probe with an ohm meter. If zero or infinite ohms, replace it

Likely takes a torx wrench or some other special star tool to open it.

Could be a bad relay a bad mag tube or a bad timmer or a bad door switch. Needs to be trouble shooted. You have to get it open and check the fuses and test the voltage on the pri transformer first.

This is usually caused by either a bad door switch, a loose door switch mount, or a problem on the control panel.

Even though a door switch clicks, it may still be bad inside. Its continuity must be checked.

Door switch or mount trouble can be caused by slamming the door or by opening the door while it's cooking without hitting the Stop pad first.

If you someone you know decide to look into it, we have critical information on safety, disassembly and door switches at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

You can find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383

If you think the problem is on the control panel, which we repair these nationwide for $39.95 postpaid.

We're happy to help and we appreciate your thoughtful rating of our answer.

try leaving umplugged 30 min.then try .