Gurlsluvchocolate :
My laptop's screen went extremely dim. Can't even see the bios screen. So lenovo tech support said it's the inverter. Problem is, my warranty expired already. So I'm looking to find the inverter so that I can replace it myself. But I can't find it anywhere. Any suggestions? Please help!
In case you're still having trouble with your screen:
1. The Y50-70 doesn't use an inverter like ThinkPads. Instead, there's an LCD cable, like this one from eBay:
http://www.ebay.com/itm/S-union-LCD-Screen-Non-Touch-Cable-for-Lenovo-Ideapad-Y50-70-with-FHD-1920-1080-/332199184199?hash=item4d589d4747:g:XEAAAOSwCQZZA-BY
This is the non-touch FHD version. The Manufacturer's Part Number is DC02001YQ00. The touch version MPN is DC02001Z700 and available here:
https://www.ebay.com/p/lenovo-y50-series-lcd-video-cable-dc02001z700/1537007787
You can also contact Lenovo and supply this FRU number: 5C10F78848. If your Y50 uses a UHD panel, the FRU number is 5C1078811. Please note that this component is an FRU, or Field Replacement Unit. This is IBM/Lenovo-speak for 'certified technician only'. While replacing the component isn't impossible, I recommend you consult a hardware maintenance manual, like this one:
https://www.manualslib.com/manual/728650/Lenovo-Y40-70.html#manual
Go to page 70 (or click '1130') for a detailed guide.
2. Alternatively, it might be a software issue relating to the BIOS or the power management app in Windows. I know you said that you can't really see anything on the screen, but if you can get a workable screen by pressing the Novo button, located to the left of the power-on button, you could select Load default settings in the BIOS menu and/or select Backflash BIOS.
Best of luck,
GreyCatz.