My laptop keeps flashing a blue light everytime i switch it on

Sounds like the battery itself is going bad and needs to be replaced. The blinking lights are a code that you can find at the OEM website and it will tell you exactly what is going on..

How to Fix Kobo eReader Locked up Frozen or Not Responding
1)Slide power switch to right and hold for 15 seconds and release

2)Slide power switch to right again and hold till green/blue button near switch lights up.

The computer is in the "Sleep" state. The Service Manual is available at: http://h20628.www2.hp.com/km-ext/kmcsdirect/emr_na-c03758231-1.pdf

That means that your hard drive is reading and writing just as it should be nothing to worry about when its blue

The main tv Tuner signal board it is dead or it have problems,but tv still usable.Tries push the remote power switch off/on again everytimes OPC/Power LEDS lights flashes.Have to do this maybe 3 or 4 times for the tv to have a lite up LCD screen panel backlight to make the tv Tuner signal board to work again,for the tv to work.If still have same problems after 3 or 4 times power switch pushes off/on still have OPC/Power LEDS lights flashes.Mean the main tv Tuner signal board it is dead and can not be trying to save it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole new refurbish tv Tuner signal board for the replacement.This solution 100% will work,if ur tv main Tuner signal board still have life left in it.I do this every few days out of a week for my 46" Sharp Aquo LCD tv set,tv it work all the times.

Check the battery, it is possible that they connection to the unit is either loose, severed or not working, Worst case scenerio the mobo is gone. Also remove the hard drive and or the memory to see if you get any graphics. either or could be stopping the boot process

The battery is failing to recharge itself.
Contact Dell -- a battery should last longer than that.

I think it means your device is active with another device (could be pc or laptop) transmitting signals

Switch the bluetooth function on your phone, search for devices and then pair with your headset once it finds it. Allow it to connect without confirmation and leave your bluetooth switched on on your phone. Everytime you turn on your headset it should connect automatically.

dead battery - buy a new one probably about $10