manumathew.017
Member
It's not starting up, But the fan is running, No chime, No display, or No backlight
Could someone please help me with the schematic and board view?
Could someone please help me with the schematic and board view?
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A1707 - EMC3162 No chime, No display
- Thread starter manumathew.017
- Start date
manumathew.017
Member
I could find the 820-00281 schematic, As per this schematic and board file here is the voltage values
All the readings are using the charger after disconnecting the battery connector. After disconnecting the battery it consumes a total 1.47Amp current at 19.7V.
L8410 - PPVIN_S0SW_LCDBKLT - 0V
L7660 - PP3V3_S5 - 3.324V
L7600 - PP5V_S4 - 5.12V
L7900 - P1V2_PHASE - 1.205V
L7960 - PPVCCIO_S0_CPU - 0.978V
L8000 - PP1V_PCH_REG_R - 1.014V
L7030 - TBA_PHASE1 -12.68V
L7410 - PPVCCGT_CPU_PH1 - 0V
L7420 - PPVCCGT_CPU_PH2 - 0V
L7211 - PPVCC_CPU_PH1 - 1.045V
L7221 - PPVCC_CPU_PH2 - 0V
L7231 - PPVCC_CPU_PH3 - 1.047V
L7330 - PPVCCSA_CPU_R - 1.052V
LA640 - PPVCORE_S0_GFX_PH2 - 0.903V
LA650 - GFXIMVP_PHASE1 - 0.903V
LA350 - VRVDDCI_R - 0.902V
LA300 - PP1V5R1V35_GPU_REG_R - 1.349V
LB700 - P5VUSBCT_R - 0V
All the readings are using the charger after disconnecting the battery connector. After disconnecting the battery it consumes a total 1.47Amp current at 19.7V.
L8410 - PPVIN_S0SW_LCDBKLT - 0V
L7660 - PP3V3_S5 - 3.324V
L7600 - PP5V_S4 - 5.12V
L7900 - P1V2_PHASE - 1.205V
L7960 - PPVCCIO_S0_CPU - 0.978V
L8000 - PP1V_PCH_REG_R - 1.014V
L7030 - TBA_PHASE1 -12.68V
L7410 - PPVCCGT_CPU_PH1 - 0V
L7420 - PPVCCGT_CPU_PH2 - 0V
L7211 - PPVCC_CPU_PH1 - 1.045V
L7221 - PPVCC_CPU_PH2 - 0V
L7231 - PPVCC_CPU_PH3 - 1.047V
L7330 - PPVCCSA_CPU_R - 1.052V
LA640 - PPVCORE_S0_GFX_PH2 - 0.903V
LA650 - GFXIMVP_PHASE1 - 0.903V
LA350 - VRVDDCI_R - 0.902V
LA300 - PP1V5R1V35_GPU_REG_R - 1.349V
LB700 - P5VUSBCT_R - 0V
CPU core should drop from 1.05V to 0.6V aprox, when board really boots.
Did you try knwon good BIOS?
PLT_RESET_L comes high?
Any history fault available?
Did you try knwon good BIOS?
PLT_RESET_L comes high?
Any history fault available?
manumathew.017
Member
I have removed the board, it is 820-00928-A, I could see some areas are a little dirty and a bit corroded. Please find the video attached. Does anybody have a schematic and board view for this particular model?
drive.google.com
a1707 - Google Drive
drive.google.com
manumathew.017
Member
I could find the schematic and board file, Sharing it in the same google drive above.
The corrosion is around U3900 (DDR4) , and U3100.
The corrosion is around U3900 (DDR4) , and U3100.
L7211/21/31 must all have the SAME voltage; check schematic.
Please reply the previous questions.
Please reply the previous questions.
manumathew.017
Member
When I test board separately , L7211/21/31 all these voltages stays 0V.
Same time PLT_RST_L stays HIGH (3.3V). CPU is heating UP (Heat is keep increasing)
Same time PLT_RST_L stays HIGH (3.3V). CPU is heating UP (Heat is keep increasing)
You've said 1V at L7211/31; which is actually state?
PLT_RST_L shouldn't go high, if no CPU core voltage present.
PLT_RST_L shouldn't go high, if no CPU core voltage present.
manumathew.017
Member
L7211/31 was 1V when it was connected with the display. When I test board alone L7211/31 are 0V
And you have high PLT_RST_L in such case???
manumathew.017
Member
I have connected back to the enclosure, Measured PLT_RST_L, It is still going high (3.3V).
what does it mean?
what does it mean?
Means the CPU core voltage is there; which is the voltage after 10s?
Just in case, try known good BIOS.
Just in case, try known good BIOS.
manumathew.017
Member
The core voltage is 0.903V after 10 sec. Could you help me with a known working bios?
Try this one, as is.
drive.google.com
820-00928 outimage.bin
drive.google.com
manumathew.017
Member
Tried new bios which you have given, It didn't made any change
manumathew.017
Member
Additional info---> , After new bios , CPUCORE_SW1/SW2 are 0V, Also PLT_RST_L is low (0V)
That is not normal; try again original BIOS.
manumathew.017
Member
Good News z, Tried a new image attaching below ,,,, It is worked , Now its booting
drive.google.com
A1707_Working_BIOS - Google Drive
drive.google.com