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Troubleshooting
No Display troubleshooting
No Display troubleshooting
If the E5052B displays nothing despite it is powered from proper ac power line, isolate the
failure in accordance with the procedure shown in
Connect the keyboard to the E5052B rear panel connector, turn the power on and start
trouble isolation. The methods of trouble isolation are described in the procedural step 1 to
6.
Figure 4-2
No display trouble isolation procedure
e5052bse1002
58
No Display Trouble
Isolation start
1
Check rear panel fan and
dc monitor LEDs on A21
Fan ok
No
and LEDs light?
Yes
2
Check system fan inside
No
System fan ok?
Yes
3
Connect external monitor
Displayed
No
on monitor?
Yes
4
Check flat cable between A20 digital
mother board A22 front key board
No
Flat cable OK?
Yes
5
Check LCD backlight
No
LCD backlight ok?
Yes
Replace A51 LCD
Figure
4-2.
No
A51 outputs ok?
Yes
No
A22 outputs ok?
Yes
Replace A21 PCI DSP Card
Replace A20 digital motherboard
Replace flat cable
Replace A52 inverter
Replace power supply
Replace A22 power dist.
Chapter 4
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Table of Contents
Troubleshooting
