I changed the battery but the unit still does not come on Efx576i

OPERATION
WARNING: To avoid the risk of personal injury, especially to the eyes, face or skin, DO NOT
direct the air stream at any person.
1. Remove tire valve cap.
2. With clip-on air chuck lever depressed, firmly press chuck onto tire valve stem and release lever, ensure
that no air leaks.
3. Press the grip to inflate, press the grip half-way to deflate.
4. On: Press the on/unit/light button to turn on the inflator. The inflator has an auto shut off to prolong
battery life: it will turn off automatically 90 seconds later.
5. Backlight: When the inflator is on, press the on/unit/light button to turn on the backlight, so to read the
pressure easily in darkness, the backlight will extinguish automatically in 5 seconds. Backlight will not be
activated by turning on the inflator, can only be activated by pressing the on/unit/light button.
6. Unit Change: Press on/unit/light button above 3 seconds, enter unit change mode, then press
on/unit/light button shortly to choose the desired unit. The unit chosen will be default unit for following
usage.
7. The inflator’s battery is CR2450, 2.4-3.6VDC, if the voltage is below 2.4V, the low battery signal on the
top left will be flashing continuously, to remind user to change the battery. Refer to the battery changing
directions in this manual.
8. Measuring Range: 0-12BAR (0-175PSI). Reading Accuracy is 0.01BAR (0.1PSI). Max. Inlet Pressure is
15BAR (218PSI).

Try installing all new batteries. Latest installs have the individual units also hard wired to each other so that when one goes off the others are triggered. When a battery is weak in unit it often causes the main unit to chirp along with some of the others in sympathy. If still no improvement and all batteries are brand new, then either get new units or disconnect the hard wiring between all units.
They will still work but without the nasty global feature.

You may need to change the frequency of the chime. In this model, you need to remove the batteries from the receiver unit and wait for a while. Then replace the batteries. The doorbell unit should automatically set itself to a different frequency once you press the button, which will(hopefully) solve the problem.

It seems impossible to find the instruction manual for the doorbell. But see http://oddsnsods.net/blog/?p=68 who had a similar problem with a different Siemens model, which works on the same principles. (I can't seem to be able to remove the battery from the door bell unit on the jsjs204, but it reset itself after changing the batteries in the receiver).

Some smoke detectors are AC-only, so there is no battery. Dual-power units typically have the battery compartment on the back of the unit, where it attaches to the wall or ceiling.

Most units must be removed from their mounting bracket to change the battery, as the battery cover is on the back.

You rotate the unit about 1/2 turn counter clockwise, and it should come off the wall/ceiling. If it has an AC power connection, you unplug that so you can change the battery more easily.

my korg m1 is not turning on?

Without battery, BIOS just gets reset to default and should not effect boot. There is a possibility that you failed to reconnect something important when disassembling the unit.

What exactly happens when the unit turns on?