My nx7300 is not booting up. I have some lights that go on and the fan is running, but no screen, and no keyboard functions. The battery is about 1.5 years old

either your backlight has failed or you have hit one of the function keys which selects external monitor- can you connect it to an external monitor to see what happens?

Remove the battery and the adapter into the wall. When you boot up hold F10 or F12 (if one doesn't work, alternate).

Failing that, it could be a disk or other hardware failure, and you're going to need to take it in to be serviced. Good luck!

Does BIOS messages appear, or is the screen absolutely black?
If you see BIOS messages and then black screen, you should go to BIOS and choose your boot devices correctly. If there is no screen do the following tip:
1) Turn off the laptop.
2) remove the battery.
3) click and hold power button for about 30 seconds to discharge the circuit from motherboard.
4) then install the battery again
5) and click power button.

See what happens. In many cases it helps.
If there is still black screen, you should check your laptops RAM. In many cases removing and then installing back the RAM helps.

Either something got spilled in it or the connection ribbon got jossled lose. The top power bezel should be in with clip snaps. Remove it then the keyboard should pop up after you lightly squeeze the sides in. Look under the keyboard there is a ribbon that connects with a lock snap. Lightly push the lock clip up and push the ribbon back in and snap the clip back on. Do not put it all together yet try booting it apart and try the keyboard. If it still doesnt work power down remove battery unplug it and finish removing the keyboard order u a new 1. They run around $20 brand new.

I'd try messing with the memory. Try booting one single stick in each of the slots.

I've noticed that this happens pretty frequently with certain hp / compaq models.

If you've already tried that you can try removing the cmos battery for 5 minutes but aside from that the motherboard has probably gone out :(

I hope it's under warranty!

DEAR first you check any beep come in laptop
after that check any beep com when you remove the laptop RAM....
If after remove ram any beep come then repalce your laptop ram and try .....
if not then tell me after that ill tell you ....

I guess your battery needs to be flash.

Try Screen switch function to switch from Internal screen to External monitor to Both.
Normally FN + F4 (on Compaq or FN + F7 on Lenovo check the Function symbols on your Keyboard: allow few seconds after command to refresh configuration.
try Safe mode also. to check if display shows in VGA format.

Check to see if your Display is bad or Video is bad..
To Do This....
Plug an External Monitor into the laptop serial port..Boot the laptop and use the function key plus F5 to boot to external screen... If you see your PC running on the external screen it is a Video card/chip problem.....

Do your lights run ..the Power Light/Battery light/ hard drive light??? Do you hear the hard drive spinning??

by removing your battery you are not going to loss your data
so you can do it
but i think you should try this battery by abstract this battery first and than clean that chep by air and reconnect your battery you will find the solution