Flashing battery/ power light.

IF the battery is bad the charge lndicator on the laptop will flash (But not periodically) it will be a constant on-off-on-off..... Best check would be to remove the battery completely and use the adapter/charger power supply only. If it still does not turn on then you either have a bad power jack connection or a more serious motherboard problem. Also is the green light flashing on the adapter/charger or is it the charge/battery indicator on the laptop?

first problem its a compaq go buy something else no seriously buy something else
check your bios settings F10 for compaq if i remember corectly might be F2
http://h18000.www1.hp.com/products/quickspecs/11349_na/11349_na.HTML

http://reviews.cnet.com/desktops/hp-compaq-evo-d510/1707-3118_7-20719364.html
i mean com on 533 bus and dosnt saport multi core cpu's
my 2004 dell 200 mhz buss saports quad core wth
if its not a bios setting replace your keyboard good luck

i have a dimension 4600c. same problem. amber flashing light no sounds. replaced my power source and its now working fine. bought one on ebay for $47

shortage on the motherboard, needs new motherboard.

I believe this would mean that your battery either has a low charge or if you have the AC power cord plugged in, it could mean your battery is bad and won't take a charge

Have you tried removing the battery and replacing it again?

as far as I remember its the wireless working, if you press the button on the far right u can disable the wireless..this will turn off the flashing green light.

Have you adapter checkup also that its supplying constant
supply.

Bad DC IN (probably after last repair)
One side of the DC Jack is not getting ground connection.

This happens when one of the negative leads are not connected. Simple fix for skilled tech

it all depends on the number of flashes , pause, repeat.
Since the problem did not indicate any beeps her is the following info


Power LED blinks RED 2 times, one every second, followed by a
2-second pause. = Processor Thermal Protection Activated


3 blinks 1 second apart = Processor not installed (not an indicator for a bad processor).

4 blinks 1 second apart .= Power Failure (power supply is overloaded)

Other possibilities are:
5 blinks 1 second apart No memory
6 blinks 1 second apart No graphics
7 blinks 1 second apart System board failure (detected prior to video)
8 blinks 1 second apart Invalid ROM