Need computer expert help.....

According to me :

for the first problem you need a data recovery software to recover the lost data, and

in second problem open the cabinet....take out wires which are connecting motherboard with with the hard disk and again plug them TIGHTLY. If this does not work then restart your PC and just after restarting start pressing DEL and their check is the system is detecing your HARD DISK....If not then i am afraid, may be your hard disk is crashed !!

I CHANGED THE CABLE BUT ITS NOT WORKING, HAVE DATA IN THAT, CAN I RECOVER THAT...

Recuva is a good data recovery software...

it can be recovered....and a computer professional or engineer will help you becuase when data is lost it is broken up in many parts.....very diffecult do do it bt could be easy for computer professional or engineer....ye karne ka bhi alag hi funda hota hai !!

THANKS APOORV FOR HELPING..

THANKS TO DHAVAL FOR GIVING SOFTWARE NAME...

change the computer...!! 

OEYYYYYYYYYYYYYYY...PRESENT ME NEW ONE DEAR SHINING STAR.....HEHEHEHHEHE

Most welcome....if there is some more problem or anything....you can tell....i ll ask the engineer !!

Welcome Sir...

BEFORE MOTHER BOARD GOT REPAIRED DINT HAD PROBLEM OF LINUX, BUT AFTER MOTHER BOARD GOT REPARIED, LINUX GETTING PROBLEM SAYING GRUB ERROR..SOME TIMES IT WILL BE K SOME TIME IT WILL GET ERROR..SO WHAT WILL BE PROBLEM....

Maybe they didnt weld the board properly...seems software trouble to me

MY FRIEND TOLD THERE IS ONE OPTION IN MOTHER BOAD SAYING RE-WRITE SOMETHING MAY BE IF THEY CHANGE THAT IT WILL GET PROBLEM LIKE THIS..SO ITS TRUE...

I THINK IF THEY DONE ANYTHING WRONG IN MOTHER BOARD MAY BE CHANCE OF THIS CRASH TO HARD DISK...

sir for the second problem i wud say... just check if any dust or some rust is there on the pins....

nd if that also doesn't work... leave it... get it checked with some expert... bcoz by taking any future advice from othr( wid all due repect of others)..... you  might loss some othr data too...