The +5v and +12v are really way too low for a successfull boot.

These numbers show your Analog board needs recapping asap: the capacitors are definately degraded, probably most of them have already failed.

Try disconnecting the power of the HDD to reduce the load.

While it's not a solution in the long term you can increase the output voltage of your Analog board.

In the middle of the analog board ( component side ) there's a small white plastic screw. Turn it clockwise gently to increase the voltage.

However I strongly recommand this as a short term solution.

It's possible that adjusting the voltage pot isn't enough to get the voltage back in specs because too many capacitors are failing.