Screen is black, no fan is running, LED lights for volume is on/off

On a random day, I opened up laptop to use and hit the power button, everything turned on but the screen slowly went white. turned back off & then back on & still did same thing. A couple months later, tried to use it again, LED lights for volume, network, and light on front of laptop are lit, but everything else is not; screen is black, no fan running. This is only when I plug an HDMI cable from one laptop to another. Laptop was plugged into charger, when it is unplugged of hdmi, it is completely useless. Is there some way I can get the files back that i had on the laptop? my brother said a while back that it is completely shot. Id really appreciate some help & if anyone knows the fees I would have to get it fixed by HP or best buy, that'd be great! ( if it is even worth fixing, let me know.)

If you want us to help, then tell us what kind of laptop we are discussing. What are you trying to do by running an hdmi cable from one laptop to another? It will do nothing so don't do it. You can check to see whether it is the motherboard or the screen by connecting an external monitor and see if it gets a picture on the external screen. You can get your data off by removing the hard drive and using an adapter to connect it to another computer.

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