Gargare Door Opener Sticking

Hi- My garage door stop working a few days ago during the coldest and rainiest nights of the year. It went up 3 ft then stop. Now it won't go up or down. I had to manually close the door by releasing the locking mechanism on the carriage. There's power on the unit. There's a green light that blinks consistently every one second. I've gone thru the troubleshooting with Genie customer service, i.e. 1) lifting door 3 ft off ground and manually cycling the door back and forth, 2) unscrew wires on wall unit and then touching red and white wires together, 3) unscrew wires on 1 and 2 on actual unit hanging from ceiling and using needle nose pliers, touch 1 & 2. After these tests, it's still not working. Genie customer service tells me that the motor board p/n 34463R needs to be replaced. How does she know this? Why not the control board instead? Also, if it is the motor board, there's a 3/4 inch fuse on the board. Could the problem be as simple replacing a broken fuse on the motor board? Any help is greatly appreciated. Thank you for your time.

hi all my old craftsman chain drive opener dies friday. worn out drive gear. yesterday, i replaced worm and drive gears, plugged it back in, it sparked and that was it. blew circuit breaker, etc. so, i have new 1/2 hp craftsman as of now. this one: [url=http://www.sears.com/shc/s/p_10153_12605_00953920000P?sid=IDx20070921x00003a&ci_src=14110944&ci_sku=00953920000P]Sears: Online department store featuring appliances, tools, fitness equipment and more[/url] which should be exact match to already installed hardware. drop down blown one, plug in new one, be happy. here's my question: guy we bought house from apparently did all the wiring himself. weird is not a word to describe it. my garage has 2 car and single car doors. opener that blew is on the 2 door side. i had 4 wires running to the control board in the back of it. control board has 3 terminals. facing board, left and middle, red, terminals, are for wall mount push button. i have no problem there, i will run it direct to the opener. old opener had 4 wires though. one to the left terminal; TWO to the middle terminal; one to the very right terminal. unfortunately, those wires go into the ceiling and some of them are connected to the push button, and some of them - to the door sensors on either side of the garage door. obstacle sensors, or something. lens with light. at this point, i have little doubt i'll be able to run push button to opener directly. but i am not sure how to run those sensors wires. make things better, his choice of wires was simple - they are all white. there are 2 wires coming out of those sensors, going into the wall, and coming out of the ceiling. there are multiple spliced wires right where they come out of the ceiling. one thing i do NOT want to happen is to blow something. i will not use old push button, and will run bell wire to opener direct from a button that came with new opener. but those sensor beat me. i am assuming he spliced four sensor wires into two, and then ran one to the middle terminal and one to the very right one. i can do ok for some time w-out those sensors connected, but they come handy. it is pouring down here, and wife has to park outside, she can not prop the door up by hand. and i have only one night left today to fix all this. will most appreciate help. a drawing will help either. i do not mind having wires run on the wall or ceiling at all, mof, single car door has them that way. it's 10 30 am, i should start on this around 4-5 pm today. please, help.