Answer to: ZTE Zmax Pro: black screen/glowing home button, won't even vibrateMy mom's phone was having this exact issue. I searched for a solution and found this website but no answers. I finally figured it out, for all those suffering- PRESS AND HOLD BOTH VOLUME KEYS SIMULTANEOUSLY FOR 20 -30 SECONDS OR UNTIL THE HOME BUTTON STOPS FLASHING AND STAYS LIT. THEN RELEASE AND PRESS THE POWER BUTTON. Your phone should boot up like normal.