Sometimes, out of the blue, when i snap on my M91 and touch the joystick, i will here a faint click and the power display will start blinking. the machine will NOT move. any ideas?

The orange light on solid should signify it is charging. If the orange light flashes, you count the flashes and that is the error code

http://www.invacare.com/doc_files/1125038.pdf

https://www.google.com/search?q=invacare+m91+orange+wrench+light

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You are getting a motor error code. Check motor wiring and connection to the main control box. Motor may have gotten unplugged when changing the batteries.

Hello,

Seven blinks is most often the joystick. A Invacare Remote Programmer can be plugged in to the joystick to verify this.

You need to worry when you don't hear a click

You have low batteries and need charging if you been charging and still get the red lights then the batteries need to be replaced and have the charger checked for correct output. If you have a voltmeter you can check the charger by plugging the on-board charger into the wall set the voltmeter to 200 volts dc and plug the leads into the two outter holes of the charger port located under the front of the joystick. with the charger pugged in you should be reading 27+volts if you aren't getting any reading or the reading is lower than 25 volts then replace the charger or get an offboard charger and try charging the batteries via the joystick charger port Hope this helps

I am new to this request. Hope you have had your chair fixed by now, but in case not. If you still need help I really need more chair information. What joystick? Many different joysticks with different yellow lights. With a 4 or 5 blink it could be a motor or battery voltage problem.

truffles e-mail me at [email protected]. I need to know if you are getting any flashing lights on your joystick and are you hearing the brakes click when you move the joystick. Thanks

just replace the keypad or if you are mechanically inclined remove joystick take the top off and glue a small piece of foil to the bottom of the on/off button reassemble and try that if that doesn't fix it order a new pad from a provider in your area

You have a remote, joystick, problem.

Some chairs, like the M91 are a real bear to replace the batteries and connectors can get knocked loose in the process. First, using a voltmeter you need to see if the controller is getting power. On the DC setting, use voltmeter at the three-pin female connection at the joystick that is the charging port. The two pins that are opposite each other are the "hot" pins, and your meter should read about 25 volts, +- 2 volts. If its 0, there is a connection that isn't made from the batteries through to the controller, or the controller or joystick is shot. If you do have power to the joystick, then it's probable that the joystick is shot. A new one from Invacare is pricey, around $1,000.00 I have found a new site that can repair most makes. I have not used them, so cannot vouch for their work, but give them a call and see what you think.
http://www.flightsystems.com/cart_controls/wheelchair_powered_scooter_market_cart_controls.htm

If you don't have power, start at the terminals from the battery, and follow each wire back to the power control box, unplug and replug firmly as you work your way back. Check all fuses on the way. Then check all of the other connectors inside the chair, unplug, and reconnect again. Unplug and reconnect the wires leading into the power control box, and then restart chair. If no lights still, then the power control module is probably the culprit, but the address above fixes those too. The joystick and the power control module work together to make the chair operate safely. Good luck