Canon T 90 - Manual (Page 188)

3. Batteries
Even if one blinking bar mark or no bar mark
appears on the display panel during battery
check, Indicating that the batteries are low,
as long as the shutter releases, exposure will
be correct. Automatic rewind, however, may
not be possible because of the insufficient
power of the batteries. Also, if the camera
happens to stop during rewind, all of the film
transport bars start blinking on the display
panel to warn you. Automatic rewind will start
again once you replace the batteries with the
new ones.
4. HELP Display
"HELP” may appear in the viewfinder in the
case of camera malfunction or operational
error warning. When "HELP" is displayed, per­
form the following operations:
1) Check the batteries by pressing the bat­
tery check button inside the palm wing.
2) If the battery voltage is sufficient, remove
the battery magazine once and reset it.
3) Release the shutter once.