I have a hp g6000 and when i press start the blue light comes on for about a second then goes off again and continues to do this in a cycle, never actually starting up and screen remains blank. any ideas.

Remove then replace battery. try again. If on the external power supply press and hold the power button down for several seconds. Now remove the battery and disconnect the power plug. I f this still doesn't fix the problem, the man board may be bad. It is a known issue with this model. Good Luck.

Its normal for the machine to cycle the lock before starting its cycle. I'm assuming your machine is a bravos style.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/jason_4570d45317834dd3

Hold the Power button and at the same time attempt to continually press the button for the CD/DVD drive. Continue until the status lights for power, hard drive and power button stay on for 3 seconds or longer. When status lights remain on, remove your finger from power button and allow the machine to boot as usual. Enjoy.

is the ribbon cable damaged at all?did u install it correctly?
pull it out and put it back in and lock it in place i think by pressing down the lil tab

Any Short circuit happen in *********** board check it.

Extract your battery from your laptop for 12 min, then start your computer using your power cable (don't use your battery), if not try pressing F2 rapidly when opening, after you open your operating system try changing your graphics card drivers.

There is a problem with the power supply. Replace the power supply with a new one.

disconnect the power cable from the back of the printer
press and hold the power button for 30 seconds with the power cable unplugged
connect the printer directly to the wall outlet without any surge protector
disconnect the power module with the power cable
and try to power onn the printer
if the same issue continues
call HP and let them know the trouble shooting that we did and if the printer is inwarranty they will surely replace the printer for you ....................... thank you
HAMID

Change your charger, your charger has problem.