If the battery light is blinking orange then that indicates it is charging.
Is you get a green power light when it turns on then it is turned on and powered up fine.
Turning on but having nthing on screen more often than not indicates a faulty GPU on a laptop.
Try reseating the RAM, HDD and disc drive.
Failing that you could try a reflow if you know how. other than that I would call it a dead duck.