LAT9520AAE wont run, fill or anything, but is plugged in and worked before

Dear Tomer,
I looked up your machine on "searspartsdirect" and discovered you may have one of 2 things that may be faulty.
The easiest one is a loose, slipping, or worn out drive belt.
We will be hoping it is that , and not a worn out "gear case".
If the belt is loose, old, worn out, or slipping, try that before you do the "transmission" gear case, which may be so expensive you may opt to replace the machine.
God bless your efforts.

The safety latch could be worn or stuck, the lid not closing tight enough to disenage the safety lever

When is the last time the car has had a timing belt could it be bad??

Is the belt slipping? If it's slipping you'll notice it, because it'll smoke pretty soon. If, as you watch it under varying load, it slows down with the blades then the belt is fine.

If it's not the belt then it's going to be the electric clutch that drives the belt. Get your voltmeter out and tap into the wires that go to the clutch, watch it as the mower runs. Anything under about 13V and the clutch may slip. If the voltage is good then the clutch is worn out. They don't cost too much, I'm pretty sure they're well under $100 still.

Make sure the wires that plug into the clutch are making a good connection. You want to check the voltage between the switch and clutch so that you're also checking the switch- if it's got a little crud in it, or a bad connection farther up the line, it can cause the clutch to slip, and you'll see this as the voltage dropping.

lp

The belt may be in place but it appears to be loose and slipping. Probably worn out. You hear the hum because the motor is running but the belt will not let it drive. When you have it apart make sure the part the belt is driving turns by hand.

That means that the belt is broken, stretched or worn. You need to change the belt. You can get replacements here:

Replacement Vacuum Belts

rotate pulleys while trying to reinstall belt. if belt slipped off on its own then belt is streched out. replace belt

suggest that the drive belt is worn and slipping under exess load solution replace belt regards billnkaym

1 Inspect Battery Damaged or faulty battery and/or connections. 2 Inspect Coil - Ignition Damaged or faulty ignition coil or ignition coil circuit. 3 Inspect Fuel Filter Clogged or dirty fuel filter 4 Inspect Fuel Injector Pressure Regulator Faulty fuel injector pressure regulator or circuit. 5 Inspect Fuel Pump Improperly functioning fuel pump or circuits. 6 Inspect Wireset Damaged, worn, or deteriorating spark plug or coil wire(s). 7 Inspect Control Module-Ignition Faulty ignition control module or circuit. 8 Inspect Solenoid Switch Damaged or faulty solenoid switch or solenoid switch circuit. 9 Inspect Starter Damaged, worn, defective, or faulty starter or starter related circuit. 10 Inspect Neutral Safety Switch Damaged or faulty neutral safety swittch or circuit. 11 Inspect Fuse Corroded, burned, or shorted fuse may be interupting power source. 12 Inspect Fusible Link Corroded, burned, or shorted fusible link may be interupting power source. 13 Inspect Battery Cable Corroded, broken or poorly connected battery cable. 14 Inspect Spark Plug Wire Loom - Performance Improperly adjusted or worn/malfunctioning carburetor. 15 Inspect Distributor Cap Loose or cracked distributor cap 16 Inspect Distributor Cap And Rotor Kit Loose, cracked, or worn distributor cap and ignition rotor. 17 Inspect Fuel System Pressure Incorrect fuel pressure being delivered to carburetor or fuel injection system. 18 Inspect Fuel Injector Plugged, dirty or poorly connected fuel injector. 19 Inspect Ignition Switch Worn, damaged or faulty ignition switch or circuit. 20 Inspect Spark Plug Fouled, damaged or broken spark plug(s). 21 Inspect Belt Incorrectly routed, adjusted(tensioned), missing or worn drive belt(s). 22 Inspect Timing Belt Slipped or broken timing belt. 23 Inspect Timing Set Slipped timing chain or worn timing gear(s). 24 Inspect Fuel Tank Contaminated fuel from rusted or deteriorated fuel tank. 25 Inspect Ignition Timing Incorrectly adjusted engine timing.

https://www.partselect.com/Models/CDE22B6V/Manufacturer/1/

This could be one of several things. There is a switch connected to the belt on the drum and if the belt slips of breaks the dryer wont start. There is also a possibility the timer is worn out