Table of Contents
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1.
No display of screen (Screen is black, color of LED is amber) ------------------------------------------------------------ 1
2.
Nothing displays on screen (Screen is black, color of LED is green) ---------------------------------------------------- 2
3.
Checking the back light unit -------------------------------------------------------------------------------------------------------- 5
4.
Abnormal screen ----------------------------------------------------------------------------------------------------------------------- 6
5.
No OSD display ------------------------------------------------------------------------------------------------------------------------ 7
6.
Abnormal plug and play operation ------------------------------------------------------------------------------------------------ 8
6.1 Abnormal DDC2 ------------------------------------------------------------------------------------------------------------------ 8
7.
Checking the interface circuit of sync signal ----------------------------------------------------------------------------------- 9
7.1 Checking the control circuit of horizontal sync pulse ------------------------------------------------------------------- 9
7.2 Checking the control circuit of vertical sync pulse ---------------------------------------------------------------------- 9
8.
Checking the resolution change IC movement ------------------------------------------------------------------------------- 10
9.
No power on --------------------------------------------------------------------------------------------------------------------------- 11
9.1 No power o n (I) ------------------------------------------------------------------------------------------------------------------ 11
9.2 No power on (II) ---------------------------------------------------------------------------------------------------------------- 12
10. Checking the DC/DC converter circuit ----------------------------------------------------------------------------------------- 13
11. Checking the operation of CPU -------------------------------------------------------------------------------------------------- 14
12. Checking the audio circuit --------------------------------------------------------------------------------------------------------- 15
13. Checking inverter board circuit -------------------------------------------------------------------------------------------------- 16
Page 18
Table of Contents
H15AAX (AL502)
Index
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Table of Contents
