Transcript kb_No Display .pptx

Repair Sharing
 [P8H61-M LE]:No Display
MB Type
L1 Problem
Description
P8H61-M LE
No Display with
on board DVI or
VGA port
Needed
materials
situation
L2 Problem
Description
Signal
Position
Number
GFX
PU1
The Initial Problem Analysis:
1 : Visually check MB slot for damage. Check front and back of the board for line breaks.
2: Check SX1 if it has 32.768 KHz or not. Check PU16 PIN2 +3VSB and OR1 PIN1 +3VSB_ATX are normal.
3: After plugging CPU and power on, on board port(DVI, VGA) has no display at B2 code.
4: Definition and Type of no display:
A. CPU socket PINs are normal or not.
B. GFX power is normal or not.
C. The working condition of CPU & SB. CPU calculates the data and it would be transmitted to SB
(through FDI bus). After that SB will transform these data to be analog or digital information
through VGA or DVI communication bus to display.
Repair process
Visually Check
Measure VCORE and GFX
Check PU1 (ASP1000RM)
Other Steps
VGA impedance of signals
DVI impedance of signals
CPU socket PIN check (FDI PIN)
1. VCORE is normal.
2. GFX has no voltage.
1. Measure the working condition of VCORE:
2. VCC (+5V)
3. EN Signal (+1.07V)
After checking other signals and voltage. Try to exchange PU1 to
solve this case.
VGA_HSYNC_R
VGA_VSYNC_R
VGA_GREEN_L
VGA_RED_L
VGA_BULE_L
VGA_DDC_DATA_R
VGA_DDC_CLK_R
+5V_VGA
SB
VGA impedance of signals
DVI impedance of signals
SB Power
SB Frequency
SB Others Signals
TX0+/-_L_DVI
TX1+/-_L_DVI
TX2+/-_L_DVI
TXC+/-_L_DVI
DVI_DDC_CLK
DVI_DDC_DATA
DVI_HDP
+5V_HDMI
1.
2.
3.
4.
5.
6.
7.
8.
+3V, 3VSB, 3VSB_ADV
+1.05V
1.8VSFR
VCCIO
3_3P3_DAV_FB
VCCDMI_PLL_PCH
VCCA_DPLLB
VCCA_DPLLA
1.
2.
3.
4.
5.
25MHz
CK_14M_PCH
CK_96M_PCH
CK_100M_PCH
CK_100M_DMI
SB
1. O_PWROK
2. S_PLTRST
2