I guess that I can't speak for all machines, as they are not created equally.
There is a great chance that nothing will happen. One day it will, and the main cause will be the constant turning on via the plug/kill method.
Those machines with a simple switch between the wall and the power-supply are usually just a, "Well, it works", solution. Casinos have thier own power filters and line conditioners for thier machines. Most businesses do.
It is not my job to provide proof, the manuals clearly state this as a fact and give a warning. (They wouldn't just make up warnings for fun. This is an issue that has struck several owners, and that warning was the solution derived form testing.)
This goes for any computer controlled apliance with circuit controlled voltage regulation. Many older machines do not have seporate power supplies, mine do.
All newer models are made with some form of protection power supply, becuse they are aware that this is the most direct solution to resolve poor power problems. For example, my power can be measured at 102v AC - 115v AC, depending on the time of day and month. (Kill-A-Watt reading.) When voltage is lower, your apliances draw more power, to compensate for the missing voltage. (Voltage regulation trades watt/amps for volt/amps.)
If you only turn your machines on once or twice every weekend, then you may never see an issue with power. If you turn your machines on every day... you will end up blowing a machine within a year. (With a five year life on these machines, 2 of which have already been used at the casino, you should not expect perfect operation after three years of use from purchase.)
I was only sending a word of caution. This is a seriously possible issue. Just because JOHN DOE lives in a perfect power grid area, or has a stable voltage, does not meen that every individual here does as well.
I have dug up some links on the matter...
http://www.slotimports.com/Support/i...on_manual.shtm
http://www.penlight.org/pages/faq_pgs/spds_faqs.html
http://guides.pimprig.com/modding/bu...wer_supply.php
The only other way that I see around this would be to have a mini-surge on each machine, after the x10 unit... you would unplug/tunrn off the whole surge unit, so when plugged in, it would possibly save damage. (They don't work if they are not already actively touching a ground lead.)
x10 works by introducing noise into the lines... that is how they communicate, by reading those organised noise spikes. Line filters may filter out x10 commands, and should be placed between the x10 and the unit being powered. x10 is an ancient and crude technology, only being sold by backyard sales agents. (Once listed readily in radio-shack in abundance, they have reduced thier displays to only include the devices which people still demand.)
