P8Q77-M Repair Guide BLOCK DIAGRAM 04/03/2012 Leilei52_Chen CSC-GRMA POWER FLOW POWER ON SEQUENCE Pink number is Diode resistance to GND(without any part on MB)multimeter type DH-1240 Frequency Flow Voltage Measure Point PU16 PL2 +5VSB 407 VCORE 491 multi meter “VΩ mA” port touch here EATX12V 12V_CPU 607 PU16+3VSB 271 PL7 OU400 +VCCIO 152 +3VSB_ATX 271 OQ1 +5VSB_ATX 407 PQ18 +VCCSA 583 PL6 PQ22 + GFX 536 +1.8VSFR 343 PQ21 +1.05PCH 25 PU15PIN4 VTTDDR 598 PL9 +1.5VDUALL214 PQ26 EATXPWR +12V 563 EATXPWR +5V 24 PL802 +1.05ME 81 EATXPWR +3V 373 +12/5VDUAL 620 Signal Measure Point 4.OR44 O_RSMRST# 17 20 PCIEX1_1 O_PCIRST#_PCIEX16_3 11 ORN4 O_ATXPG 578 6.OR71 7.1.PR2360 S_SLP_LAN# 593 O_PWRBTN# 557 18.PQ39 575 19.PCI1 PINA15 S_PCIRST# 550 19.L1C20 P_VRMPWRGD 528 S_PLTRST# 272 2.AC POWER SW ON 12.PQ316 P_VCCIO_PG_G2_10 1109 3.5VSB_ATX,3VSB_ATX 16 PR24 P_VCORE_VDIO_4 213 10.1 12V,5V,3V 14.PR308 O_PWROK# 50 20 PCIEX16_1 O_X16_RST# 579 17.VCORE 16 PR28 P_VCORE_VCLK_4 213 20 PCIEX4_1 O_PCIEX4_RST# 593 21.GFX 7.2PR893 S_MEPWROK ∞ 13.HR13 S_DRAMPWRGD 335 15.HC1 H_CPUPWRGD 481 12.PR310 4.1SR80 O_DPWROK# 17 P_VCCIO_PGOOD_G_10 ∞ 1.SR15 S_ RTCRST# 641 1.SR15 S_ SRTCRST# 641 7.1.PQ815 8.OR34 S_SLP_A# S_SLP_S4# 417 ∞ 19.TPM S_PLTRST# 542 9.OR35 7.2PQ813 S_MEPWROK 629 5.PANEL PWRBTN#_PANEL 793 S_SLP_S3# ∞ 10.EATXPWR O3_PSON# 783 ... SEQUENCE Pink number is Diode resistance to GND(without any part on MB)multimeter type DH-1240 Frequency Flow Voltage Measure Point PU16 PL2 +5VSB 407 VCORE 491 multi meter “VΩ mA” port touch... +1.5VDUALL214 PQ26 EATXPWR +12V 563 EATXPWR +5V 24 PL802 +1.05ME 81 EATXPWR +3V 373 +12/5VDUAL 620 Signal Measure Point 4.OR44 O_RSMRST# 17 20 PCIEX1_1 O_PCIRST#_PCIEX16_3 11 ORN4 O_ATXPG 578... 17.VCORE 16 PR28 P_VCORE_VCLK_4 213 20 PCIEX4_1 O_PCIEX4_RST# 593 21.GFX 7.2PR893 S_MEPWROK ∞ 13.HR13 S_DRAMPWRGD 335 15.HC1 H_CPUPWRGD 481 12.PR310 4.1SR80 O_DPWROK# 17 P_VCCIO_PGOOD_G_10 ∞