26 Dec 2011, 04:25
i just took in for repair a helbros alarm led. totally blank screen w/new cells. 344's x 2. replaced qc. still no joy. put it aside for a few hrs, it came to life, altho' it stayed lit in hrs. set mode. removed pcb from carrier and gave it a vinegar wash, followed by h2o, followed by alcohol wash. reassembled. JOY, it works. there is no id on either the module or case or screen. in looking thru my book of led/lcd models from the 1970's, the closest i came to a similar button layout was helbros. went to the photo gallery and found one almost exactly like it in mick's gallery. only difference is this one has a square unmarked screen and mick's is cushion shaped. anyone know who made the module? peter