Grrrr...sorry to have to bump this thread again. But this morning was -5C and my LCD monitor refused to open due to the annoying temp protection circuit. So I turned on my DIY 50 watt heater and it still took like 10 minutes for my screen to heat up and open. It seems that my heater is pretty much useless.
The resistors are on the bottom on the unit and I would have thought that by convection...the heat would rise and heat the rest of the unit up. Obviously my heater is not sufficient (would be even worse in -40C)...so I was wondering if you guys have any tips or advice?
Should I eBay some 10w resistors and build a 100 watt unit? How can I improve the efficiency? I remember autonode had some rugged displays that were rated down to -40C and they only had 10watt heaters.