PS3 doesn’t show anything on screen

please help me with my ps3 I’ve asked so many Reddit community’s and none of them could help me

Ok so My friend gave me this ps3 and he said the last time he checked the disc drive was not working but everything else was fine so I take it home and I turn it on and it works completely fine the disc drive was broken like he said but I don’t plan on using it. So like with every used console I get I took it apart and cleaned it ( it was VERY dirty) so I clean it and I try to turn it on and it doesn’t show anything on the screen and I know it’s not my tv and it not the hdmi cable because it’s like the ps3 crashed because the only way to turn it back off is too unplug the ps3. Now I did manage to get it to power on again and it worked fine so the I did a complete full hard drive format and it said it would take 7 hours so I went to sleep and when I woke up it was turned off and I can’t get it back on. Does anyone one know what the problem is and fyi the ps3 was not home-brewed