My laptop won't boot after cleaning it. I decided to clean my Acer v3-571g. Everything was fine, I cleaned out the dust off the fan, put it all back together, booted it up, everything was working flawlessly... Then I had some leftover bolts which I didn't screw in yet. So I decided to do that. After I screwed all the bolts in, the laptop didn't boot up. I press the power button, the button lights up, I can hear the fan working, the HDD light is on for a couple of seconds and then boom. HDD light is off, the fan is still spinning slowly but that's it. I redisassemblied the laptop, put it all back again and the problem persists. I tried booting it with, without battery , I tried everything. Every time I get totally no response from the screen... Can somebody help me please? I'm being really desperate right now as its still a pretty strong laptop and I don't want to replace the motherboard or something...