Bold 9000 won't turn on or repair

hi my bb bold 9000 died so i put it on charge nothin but a solid red indicator light so i was told to repair it using desktop and it finds it says it needs repairing asks me to install software download and instantly says error. ive tried oher things ie battery pulls leaving it on charge for 48hrs etc this is the closest ive come to fixing it and ive no idea what is causing the error or how to solve it please help x

1. Download the latest OS for your device
2. Download and install Desktop Manager
3. Make sure Desktop Manager is open, and running
4. Connect the BlackBerry and see if it reads it, and then starts to load the OS that you downloaded.

Make sure to only use the official OS for now.