Well Considering That You Plug The Pen Drive To your Computer And Its Not Detected .Assuming That The PCB Is Also Not Repairable and The Controller That Handled The Pen Drive Logic Is Getting Hot "Damaged" or Is Practically Dead .Your Deata Is Inside Such Drive .No One In Our Side of India  Can Recovery Data From Such Products Leaving Us .Being The Market Leader In Flash Drive Recovery And specilising In NAND Flash Memory Recovery We Can Get Your Data Out .We Charge Rs :3500/- For Such Recoveries and Deliver your Product Back To You Practically Anywhere In India @ Rs :85/- .If You Like To Get Your Data Back On CD/DVD Or Any Other Media We Charge Extra @ Actuals .We Have Specialised Tools and Lab To Recover Such Kind Of Data .