You've got a mechanical failure in the hard drive. Don't try to power the machine up again with that hard drive in; it's not going to work properly again, and you'll reduce the chances of recovering data.
The rest of the laptop is almost certainly fine, just in need of a new drive. A new laptop hard drive will cost you about £40-50.
If there's stuff on there which is very valuable to you, there are people who can physically disassemble the drive and attempt to recover data from the platters. This has to be done in a clean room, and is expensive - to the tune of hundreds, probably. I used Vogon to do this once.
If you can't afford that, there are freaks like me who have done amateur data recovery jobs. As skibbley suggests, cooling the drive can often unjam things because of the different contraction/expansion rates of parts of the meachanism with temperature. To do this properly you have to cool the drive whilst keeping it dry - in a sealed box with a pack of silica gel is the best way - then start it from cold in a setup ready to back it up if it works.
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The rest of the laptop is almost certainly fine, just in need of a new drive. A new laptop hard drive will cost you about £40-50.
If there's stuff on there which is very valuable to you, there are people who can physically disassemble the drive and attempt to recover data from the platters. This has to be done in a clean room, and is expensive - to the tune of hundreds, probably. I used Vogon to do this once.
If you can't afford that, there are freaks like me who have done amateur data recovery jobs. As
Let me know if I can help in any way.