have I killed it?

yesterday everything was fine, today I can't even get this to work....
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main:
high 0
pause 1000
low 0
pause 1000
goto main
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I'm using an 18x on a AXE90 prototype breadboard. I've got one cable connecting out0 to LED1. I've tested LED works by connecting straight to V+ and via SWITCH1. Pic Chip is seated correctly and I've performed a hardware reset.

What else can I try to see if the chip is b0rked??

Does it download? Or is just the output not working?

When you say "get this to work", what exactly doesn't work?
Does the program download?
If you click Options>Firmware, do you get a response?
What is your power supply? Type/Voltage?
Did you build the AXE090 or was it ready made?

I soldered the board myself and it was working fine yesterday...

3x1.5v AA
Download works fine, but the board doesn't do anything after download.
Just checked the firmware: 8.6

Supply and construction are probably OK if download works.
Could be as simple as a "stretched" header socket on the AXE090 or worst case a blown PICAXE output.
Try the same program on a different pin.
If possible, try another PICAXE using out0.
Double check that the leg has not folded under the chip rather than going into the socket.
Any history prior to failure such as playing with 12v motor or similar?

Good news that it is downloading - isolates the problem to the output.

Check a different output - ie change 0 to 1 in your program. Also make sure you have the wire in the right hole on the PICAXE input/output strip!

If one output works and the other doesn't then, yes you have damaged the chip. If none works it implies your wire is not correct!

do you have your serin pin connected to the ground with a resistor? Maybe the picaxe thinks he is receiving data on serin and keeps resetting?

how very strange indeed.

My simple programming to date had only involved flash LEDs and switch input with no issues.

After using the option>firmware option, then running the programme it appears to work again. Not sure if checking the firmware did a different kind of reset or something..

thanks for your help though

Probaly just a dogey connection to the LED

hmmmm I tried every combo of LED and output.

I find its best to ignore such things, pretend it never happened and hope it doesn't come back.....