(04-21-2013, 05:02 PM)ibfestus Wrote: Recently, I took the old machine apart, but could not determine the problem (no leaks). I reset the pressure to about double and now it produces enough air flow but is way too noisy.
Don't confuse air flow with air pressure. These machines measure the volume flow rate in, say, liters per minute, and the pressure in centimeters of water.
You can make a simple manometer by setting a tub of water in your bathtub or other place where a spill won't be a bother. When the hose is submerged the CPAP machine should make bubbles of air. The depth, in centimeters, to which the end of the hose must be submerged to stop the bubbles is the pressure, in centimeters of water.
The amazing thing is that these CPAP machines are capable of maintaining the desired pressure over a wide range of flow rates.
As far as help fixing the hardware, well, that's been discussed here, and you may even be able to find the service manual for your machine. But these machines are pretty much gone when they're gone, and yours sounds like it's gone.
You should be able to find a cheap replacement from Supplier #2
, or even by checking the want ads or craigslist.