HLP should work but it's been a while since I've used it. I think you use the last 3 spaces if I remember correctly. Basically you input like this _ _ _ _ _ H L P If that doesn't work the Master password is BOGUS but that is definitely put in backwards using the last 5 spaces like this _ _ _ B O G U S As for the left Traction diode error we had the same error come & go for years before we finally found out the motor itself was dying so you might want to look at having it rebuilt & heads up, it is a PITA to pull that motor. One tip is to make sure the Mast is tilted as far forward as possible. I can get you part #'s for pretty much anything if you need them. My e-mail is swidgett1 @gmail.com I have to type the e-mail address like that or the website deletes it...obviously there is no space in it