uBlox gets hot to touch, and now no longer works

Hi,

My uBlox GPS has been working very well for the past few days since installing it into my quad connected to the APM 2.5. However, I noticed it starting to get very hot yesterday, and now it doesn't seem to work.

The red power LED is on on the uBlox unit, but no blue lights flash on the APM when it's powered up, so it's not even recognising i have a GPS unit or searching for a satellite. (To be more precise, I get a blue flashing for approx 3 seconds after APM power up, but it does this regardless of if the GPS is plugged in).

Can anybody tell me what the possible problem is. Should it run hot? If not, what could cause this, and is it the APM at fault or the uBlox unit?

Thanks

Jake

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