my lap top is dead !

I don't know, but my lap top hp is not working any more no make sound or nosy and no turn on the screen is completely black. I had some problem before but it was making sound and my friend repair but at the moment my friend looked and he said something inside maybe hardware.
Could give some advice,please?
Many thanks.
Sandra

It sounds like the power supply or motherboard is dead.

you will need to get someone to look at it.

To identify whether it is the Power Supply or motherboard, try the following:-

1 Plug in the laptop.
2 Turn it on. Do you get any lights on the laptop? Does the power supply have a light on it, and is that on?

If there are no lights coming on, it is probably the power supply - you can get replacements. If the lights come on, but nothing else happens, it is probably the motherboard or processor.

The latter is expensive, but you need to get a professional to have a look to give you a quote.