most likely the hard drive has gone bad I have had 2 Western Digitals do that one in few days got replaced from WD and that one lasted about a year. if out of warranty can just replace the drive (standard laptop or Desktop drive) the plastic case just snaps apart finding the places to insert small screwdriver can be the trick.
If there is an oil fill/check location then regular gas. SAE30 for the oil. normally there is a drain pipe so won't just go all over chassis when changing. I think 30-50 hours should change oil (most people do at the start of a season).
mine is a front loader and had that problem before, but all washers have a pump to drain water before spin will start. Washer Drain Pump www.searspartsdirect.com When it happened to me it ended up being a drill bit got stuck in the pump jamming pump fixed with no parts required. my Model #417.43042200 KENMORE Residential Washers on a sticker in the door.
This is so important I am going to copy from Noah Ackerman. "This is a tube amp with about 400VDC available on the B+, you could easily kill yourself trying to service this amp if you don't know what you are doing and follow high voltage safe working guidelines. If you haven't given up yet, make sure you discharge the power supply filter caps before doing anything else. If you have any question at all regarding the previous statements, just give up and take it to a qualified technician. Drain the power supply filter caps"!!! All his troubleshooting is spot on, but with it being so old I would just change all the electrolytic capacitors they only have max 20 year lifespan the hum is bad caps problem and no signal is a coupling cap that tube amps have lots. I use Craig Laboratories DeoxIT www.caig.com D100L, D5 spray if I remember correctly there is reverb out jacks and the switch contacts could be dirty use the D5.
on other thing I have seen if the wiring is good will need to make sure the conduits in transformer (600-50,000 ohms I think) and mic diaphragm. sometimes iron filings collect on diaphragm and keep it from moving so no sound.
you can get the parts from http://www.troybilt.com/equipment/ARIPar...-1&storeId=10001#/Troy-Bilt/TB675EC_41ADZ67C766%2c_41ADZ67C766_...-08456-A/769-084560001 Most local small engine repair shops will sell parts too.
my best guess is the fuse links after verification that battery not bad. had a repair tech work on my AC once and they put a jumper to make the compressor stay on but that was also the same connector that had alternator charge wire so the alternator was not charging battery car ran for a week before the battery was so dead car wouldn't run. look just like a wire small wires connected to larger wire, should be near battery or power bank. hope this helps just a general answer.