I have an Orbit WaterMaster Sprinkler control, it is hooked up, but there is a light bulb that says power off and the sprinklers won't turn on. They will turn on manually at the sprinkler station. Can you help?

Try this link
https://www.hunker.com/12333769/how-to-troubleshoot-an-orbit-watermaster-sprinkler-timer

usually located on back or bottom near the selector buttons

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Need to know what your trying to connect to

Solenoid in the valve needs to be replaced.

Yes,

Is this new timer?
Or timer that worked before and stopped working?

Check outlet with circuit analyzer for correct polarity and grounding.
Reset timer and re-program, being careful to avoid conflicts and/or overlaps. Each ON time must also have OFF time with consistent days for each. If selected time is 12:00, then use 11:59 instead to avoid possible problems with am and pm conflict.
product comes with 1 year limited warranty.

Orbit digital 57880 sprinkler timer manual is 19 pages long, which is good argument for using analog timers with 1 page manual.
Troubleshoot appears on page 18 of manual, and includes Tech service number.
http://waterheatertimer.org/pdf/Orbit-WaterMaster-57880-Controller-Owners-Manual.pdf
http://waterheatertimer.org/Woods-timers-and-manuals.html#sprinkler

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Question is not clear.
Do you have programming problem with the timer?
Or problem locating sprinkler heads?
Or a sprinkler valve problem?
Add a comment with detailed information.

Sprinkler timer turns ON-and-OFF.
Timer does not advance the sprinkler to next station. The sprinkler valve advances to next station when timer turns OFF.
For example, when timer turns ON, then station 1 starts watering.
Timer turns off, and then sprinkler valve automatically advances to station 2.
Timer turns on again, and station 2 starts watering.

Orbit resources:
http://www.orbitonline.com/support/
http://www.orbitonline.com/lib/media/InstallationGuide.pdf
http://www.irrigationdirect.com/media/manuals/owners-manuals/orbit/Orbit-WaterMaster-57880-Controller-Owners-Manual.pdf

I agree that the tech help is good.
I had the Power off bulb showing.
I tested the connection with my multimeter...and power was arriving at the timer.
They said it had to be replaced and was out of warranty, as it has been discontinued as of 2007. ;-(
So I got out my hose and did it by hand for a bit...

http://free-tutorial-for.me/tutorial-for-watermaster-sprinkler-timer-wiring-manual/

http://www.google.com/search?q=manual+for+the+watermaster+57112+sprinkler+timer&rlz=1I7GPCK_en&ie=UTF-8&oe=UTF-8&sourceid=ie7#q=pdf+watermaster+57112+sprinkler+timer&hl=en&rlz=1I7GPCK_en&prmd=ivns&ei=4J3-Tf3-H4PUgQevvLzeCw&start=10&sa=N&bav=on.2,or.r_gc.r_pw.&fp=eb878a5eb62da218&biw=998&bih=431

http://www.irrigationdirect.com/media/manuals/owners-manuals/orbit/Orbit-WaterMaster-57004-57006-57008-57012-before-2002-Sprinkler-Controller-Owners-Manual.pdf