Sony VGF-WA1 - Manual (Page 66)

66
VGF-WA1 3-094-116-11(1)
Problem Causes/measures
“The DC-IN voltage is too
high. Connect the specified
AC Adapter” appears, and the
device goes into standby
mode.  An AC adapter other than the supplied one may be plugged into this
device, so the power voltage is too high. Use the supplied AC adapter.

“The internal temperature
of the device is too high”
appears, and the device goes
to standby mode.

The device goes to standby
mode, no messages appear
on the display window, and
the POWER lamp flashes
on and off.
 If you use this device at high-volume levels for a long time, the internal
temperature of this device may become too high. Turn off the device,
wait for a while until it cools down, and then turn on again.