Originally Posted by
steelbikeguy
Any chance that you've got pictures of the board or the failure?? I'm always curious about this stuff.
A bit of conformal coating on the board and solder joints can only help. Maybe a bit of RTV to seal up the housing will help too?
The board is fixed by now, but I will take and post the pictures of the board anyway. I benefited myself from the older thread, with some photos, and the news there that somebody successfully opened and fixed that light.
Originally Posted by
pdlamb
I'm surprised to read this. I noticed a few weeks ago that the standlight wasn't working on my 5 year old unit. Did a bit of surfing, and would you believe Peter White nailed it again? I had the connectors reversed, probably did it when I put a new cable on last fall. A few minutes to correct the connectors, and the standlight is working again!
On top of that, both my blinking backups failed in a heavy rain a couple days later. One blinkie shorted out, it's working again after drying and recharging. The other one had drained the batteries, drying and replacing them got that one working. The B&M provided light all the way home.
Indeed, the capacitor charges only for one of the polarities applied to the external terminals. I was quite surprised seeing that the LEDs of the Toplight came on while the board was being soaked with water for cleaning, using up the charge left in the capacitor. Whether or not the operation is compromised by humidity depends on the currents used for control - low current operation is sensitive and high is not.