2018 Alta SM totally dead


afblock

New member
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0
Location
N. Calif
Hi all.

I turned on my SM a couple months ago and it had about 30% charge. I hadn't charged it in about a year but also hadn't ridden as I was busy with a move.

Yesterday I went to charge it up and the keyswitch did nothing at all. I plugged in to 120V power (confirming the outlet was good) and still nothing, including after toggling the key back and forth a bunch of times.

Can anyone help with my next diagnostic / repair step?

Many thanks!

/afb
 

Rashid510

Well-known member
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1,171
Location
South San Francisco, CA
Hi all.

I turned on my SM a couple months ago and it had about 30% charge. I hadn't charged it in about a year but also hadn't ridden as I was busy with a move.

Yesterday I went to charge it up and the keyswitch did nothing at all. I plugged in to 120V power (confirming the outlet was good) and still nothing, including after toggling the key back and forth a bunch of times.

Can anyone help with my next diagnostic / repair step?

Many thanks!

/afb

Check the 9V battery inside the ACM.
 

Brad 594

Active member
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25
Location
Houston, TX
Last April, my 2018 MXR had intermitted black screen dead (no sound or noise from bike) when key was turned to On position. I suspected the 9 Volt to be the culprit. I successfully replaced the 9 volt battery and that solved the problem and it has not happened since. I had read many posts that the original 9 volt battery was the Energizer Advanced Lithium. However, when I opened my ACM, the battery was an Energizer Ultimate Lithium. Fortunately, the Energizer Ultimate Lithium is easy to find at many stores. Also, I was able to maneuver the ACM and get the access cover removed (it definitely tried my patience) to replace the 9 volt without pulling the main battery and disconnecting all the other stuff. Good luck.
 

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