Lion killed my 2007 MacBook Pro

Installed Lion successfully on my 2007 MacBook Pro. First run went OK. Tried restarting and won't boot. No Chime... nothing.
SMC reset and PRAM reset don't do anything. Sleep light comes on for split second, optical disk engages momentarily, then all goes dead. Screen stays black. Attempted start without RAM seems to indicate logic board is working. Getting repeating tones. Flashing light when I press and hold power is the most I can get with the memory installed.
Consider myself a pro user. Can anyone help, or should I just throw it away?  

OptionL wrote:
Installed Lion successfully on my 2007 MacBook Pro. First run went OK. Tried restarting and won't boot. No Chime... nothing.
SMC reset and PRAM reset don't do anything. Sleep light comes on for split second, optical disk engages momentarily, then all goes dead. Screen stays black. Attempted start without RAM seems to indicate logic board is working. Getting repeating tones. Flashing light when I press and hold power is the most I can get with the memory installed.
Consider myself a pro user. Can anyone help, or should I just throw it away?  
Do you have your Snow Leopard discs handy? Try to start up from there and check the state of your Hard Drive with DiskUtility. Sounds like Lion may well have hurried p a predisposed issue with your Mac.
Pete
Pete

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