Use it for parts or for trying to fix it if doesn't really work, which is the most likely reason why the mower didn't start.
PARTS FOR RYOBI 40V HP Brushless 20 in. Cordless Push/Self-propelled Lawn Mower
PARTS for RYOBI RY401014US 40V 21" Walk Behind Self-Propelled Mower
Parts for Ryobi 20 in. 40V RY401017 Cordless Lawn Mower Choose
Parts for Ryobi 20 in. 40V RY401018 /17 Cordless Lawn Mower Choose
RYOBI Bagger for RYOBI 80V HP 42 in. Zero Turn Riding Lawn Mower
YAMATIC Pressure Washer Gun Wand with Swivel 3/8" Plug & M22 Coupler, Stainless Steel Extension Lance Replacement for Ryobi, Simpson, Craftsman Power Washer for Foam Cannon Car Wash, 4000 PSI