Here is an x10 being disassembled -

Xperia X10 disassembled in mission to end touchscreen debate | Xperia X10 Blog

A PCB could be bent if the screen is cracked and can be pushed in. Basically, if anything inside the phone moves 1mm, it could potentially cause a bent PCB.

I donno man. Maybe burning down the workshop would help fix it.

Sounds like a random excuse to me. But fact is your phone doesn't work and is showing the red LED....not good.

 

To be honest if you have had enough impact/force applied to the phone to crack the screen this may have also caused damage to the main board. It would be uncommon, but could happen.

 

had this red light issue with my other handset, mine was doing the vibrate and then 3 red flash and nothing else. it is definitly a hardware issue and it had nothing to do with any physical damages (normal wear). So my idea would be the motherboard issue

 

that is really bad...sorry for your lost. It is a great phone...despite it's age and too bad that providers give so limited service...