Unplug the device, remove any data card, plug back in and see if error continues.
Repeating 2 short beeps and Service Required indicates the unit is in SAFE mode. It may be a defective power supply. If you have a multimeter, check voltage. You can try a new power supply to see if it works. A power supply from Batteries Plus or Radio Shack may have the 12-volt 5.0 amp power you need (12 volt 6.57 amps with heated hose).
If you're using the heated hose, try using a standard hose. If all this fails, the unit has to go in for service. Check Craigslist for an extra or replacement machine.
You're probably screwed, but try a few things.
Take out the water tank.
Unplug the power brick from the wall and the CPAP machine.
Unplug the power cable from the brick.
Remove the humidifier unit (not the tank) from the CPAP blower machine. There's a little slide on the far end of the bottom of the humidifier unit that releases the humidifier from the blower unit.
Plug the cables back into the brick and the blower unit. Leave the humidifier unit unconnected. See if it turns on.
If you end up getting a new CPAP unit, be sure to get a fully data capable model. There is info on which machines are good in the useful links in my signature line below.
If you get a new one, you may be able to get a PRS1 machine that will work with your existing humidifier, but you'll need to figure out whether it's a 50 series or a 60 series PRS1 machine.
Get the free SleepyHead software here
for information on the main alternative to CPAP.
If it's midnight and a DME tells you it's dark outside, go and check it yourself.
Well I pulled the sim card out of it, and plugged it into the wall outlet instead of the strip outlet and it finally came back on. Thank you for all the help
Your welcome. Your machine is getting a little long in the tooth. This will solve the current problem, but start looking for an update. I updated from a M-Series I originally got in 2008 just this past December. It was definitely on borrowed time. Since changing, my therapy has been a lot more effective, and I can finally make use of the Sleepyhead software that makes a huge difference.
WELCOME! to the forum.!
It's good to hear that you got your machine working again but I would be looking for a newer machine.
Much success to you as you continue your CPAP therapy.