Satellite P300-1A8 will not boot from disc drive

Hi,
I had a little play with start up programs, partitioning the hard drive and marking as active and deleting programs i thought i did not need.
I obviously had no idea what i was doing!
Laptop will go to toshiba screen then goes blank, i can not boot from the disc drive.
I put the hard drive into another laptop and it works fine.
I put the hard drive of that laptop in the buggered one and that works fine.
How the hell do i put the original one back with it working??
Really really stuck with this!!!!!
Any help would be appreciated.
Only thing i havent tried is the recovery disc but im not paying for one if it wont boot as itl be a waste of money.
Seems like its a compatability problem with cpu and hard drive as they dont want to be friends anymore!!
Thank you in advance

Hi!
Can you boot in the safe mode?
If you dont have a recovery disk, use the Microsoft installation disk and try to boot from it.
And you said that you cant boot from disc drive, did you tried different disks?
Maybe some are not readable or not bootable.
The best way would be a recovery disk. The installation takes a few minutes and you have a clean installation with all drivers and tools from Toshiba.
Bye

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