Dell 2355DN Service Manual - Page 97

No Power LCD NO display LED Off, Fuse of SMPS

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Alignment and Troubleshooting No Power (LCD NO display LED Off) Plug in the NO power cord? YES The power voltage supplying is NO the same as rating? YES The fan revolves when NO powered on? YES Check the voltage first and plug the power cord Supply the power as the rating Connections NO Re-connect firmly on board are OK? and re-test YES LEDs blink once when NO powered on? YES Fuse of SMPS NO if open? YES Replace the fuse Shortage on NO The connection the OPE panel error between board? controller board and panel board or malfunction YES of boards. -> Replace the boards Repair/replace the board Shortage between 5V and NO GND, or between 24V and GND? YES Toner cartridge NO Put in the is in the set? cartridge YES Remove the shortage or replace the board Detect failure due to the board which detects side cover open or switch error -> Replace the board or switch 4-57 Service Manual

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Alignment and Troubleshooting
4-57
Service Manual
No Power (LCD NO display LED Off)
Plug in the
power cord?
The power
voltage supplying is
the same as
rating?
The fan
revolves when
powered on?
LEDs blink
once when
powered on?
Shortage on
the OPE panel
board?
Repair/replace the
board
Check the voltage first and plug
the power cord
Supply the power as the rating
Connections
on board are OK?
Re-connect firmly
and re-test
The connection
error between
controller board
and panel board
or malfunction
of boards.
-> Replace the
boards
Fuse of SMPS
if open?
Shortage
between 5V and
GND, or between
24V and
GND?
Replace the fuse
Toner cartridge
is in the set?
Detect failure due to the
board which detects side
cover open or switch error
-> Replace the board or switch
Put in the
cartridge
Remove the shortage
or replace the board
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES