Hilly Ho!!! :hubba::ciao: Well folks I have these Timex digital light timers and they are great when they work.:doh: Is there any thing I can do to make it work again?:confused2: One I opened right from the package and it would not work.:angrywife: The time would not display. On another it worked for a while, a month or two ... then all of a sudden it would not allow the power to come on for the lights.:huh: I saw a review at Amazon that holds a clue ... "Purchased 3 of these Timers (not from Amazon) and took one apart (removed the 4 retaining screws on the back). See The Picture I Posted Above. As suspected, it has a Fuse that Blows at 5amps and has a 125C temperature (257F) rating printed on its case. It cannot be reset and has to be replaced. Possible heat buildup might be caused by a Load Resister that is used to reduce the voltage to operate the circuitry & the 24vdc relay that turns the Lamp/Whatever ON/OFF. A very basic power supply, hence the low price. In fact, the layout looks like it was a kit that was manually assembled. And of course if you exceed the 5amp/600 watt spec it will also blow. Connecting something that draws more than that, when first turned on, could blow the fuse after a while: A Fan with an Inductive Load or A Large Power Supply with a Capacitive Load. It's really only designed for a Resistive Load (such as a lamp) and says so on the label. With that in mind, you can probably connect Whatever, so long as it's small. Also, if the 2.4vdc rechargeable battery (that keeps the time settings when unplugged) dies, it would prevent it from working as it provides a stable voltage for the Clock/Timer to run on. Similar to the Button Battery in your Computer " I have the timer hooked to power a 430W HPS and a 150W HPS and two small fans. If anyone can help me with this please post. It's a great timer when it works, the place that handles the warranty has closed so I'm on my own. As you can see in the picture there is no button battery visible. Perhaps underneath?