Acer K2 Lifecycle Extension Guide - Page 18

Troubleshooting

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ACER-K242HYLH 18 6. Troubleshooting 6.1 No Display or display is unstable on analog or digital port: No picture or picture unstable on analog port and digital port Power off Yes Turn on power No Does cable plugs in No Connector? Plug the cable then turn on power again. Yes Does power stable? No Check Power Board DC-DC circuit and regulator Yes Is Power LED light Green or Amber? No Check Key BD and Key BD cable Yes Is Power LED status normal? No Replace IF BD Yes Does crystal work correctly? No Check crystal CKT or replace it ( Y1 ) Yes Is Interface BD normal? No Replace interface BD Yes Is LVDS cable connect OK? No Yes Replace Panel Plug LVDS cable again or replace it

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No picture or picture unstable on analog port and digital port
Power off
Turn on powe
Yes
r
No
Does cable plugs in
No
Plug the cable then turn on power
Connector?
again.
Yes
Check Power Board DC-DC circuit and regulator
Does power stable?
No
Yes
Is Power LED light Green or Amber?
Check Key BD and Key BD cable
No
Yes
Is Power LED status normal?
Replace IF BD
No
Yes
Does crystal work correctly?
No
Check crystal CKT or replace it ( Y1 )
Yes
Is Interface BD normal?
No
Replace interface BD
Yes
No
Is LVDS cable connect OK?
Plug LVDS cable again or replace it
Yes
Replace Panel
18
ACER-K242HYLH
6
.
Troubleshooting
6.1
No Display or display is unstable on analog or digital port: