Just a couple days ago; my Presario 715 started acting up. Whenever I pressed the power on button the green light came up but nothing happened after that. I could hear the sound of one of the drives for a few seconds but that's all I was getting.
From an old thread on this forum (Feb 2004), I found the feedback of someone who suggested tapping the notebook and turning it upside down. I tried that and it worked. Despite that I was quite frustrated.
Just a few hours ago I found the solution. Now it's working just fine. Here's what I did (remember it's only appliable if the green light is coming on but it's not doing anything after that)
1. Make the laptop run once by tapping or whatever works; as soon as the Compaq screen comes up press F10 to go to BIOS setting.
2. Change the boot sequence to Floppy, HD, CD Drive, Network.
3. Save and Exit.
Your Presario 700 should work just fine now.
The problem seems to be with some loose connection of CD Drive, which gets ok by tapping and it works. By changing the bootsequence we let the HDD take over right after the Floppy thus eleminating the CD Drive from the boot process.
I found a bunch of people with the same problem on the forum. I hope this helps them all.