Asus Notebook Fault analysis and repair methods
laptop November 16th, 20101. ASUS Notebook service — no power
Laptop power supply circuit for the general, we will measure: DVMAIN, H8-VDD5, 5VAS, 5V, 5VS, VCCA, VCCP, 3V_ICH, 1.8V_ICH 12V, DDR2.5V, 3V_LAN, 3VCLK66, 3VCLKCPU, 3VCLKPCI, 3V_USB. Only with these voltage, it can constitute a power circuit, but also some of the necessary laptop repair power circuit signal: PCIRST, PWRSW, H8-RESET, IDEREST, VCC5M_ON_PMH4, THERMDA, H8_SDA1, and so on. Laptop motherboard architecture according to the principle, basically all the board must follow the principle.
2, ASUS laptop repair — but no display power
Many possibilities for this situation, we are trying to exclude, first of all it also depends on power voltage is not normal, if normal, consider a signal problem. At this time signal to be measured more: SMB_CLK, CPU_STP, PCI_STP, CLK_ENABLE, USBCLK_48M, LPCCLK_H8, and we shall be judged according to the signal flow of a specific part of the problem.
1. Do not keep a good memory or internal damage.
2. Video card problem.
3.LCD screen output problem.
4. Asus Power supply caused by CPU or motherboard and power supply voltage is not normal, power output is not normal.
3, ASUS laptop repair — boot sometimes obvious, sometimes not significant, or Huaping
For the laptop VGA for this failure occurs the situation a little more, mainly because there are VGA notebook heat, especially the VGA, it’s operating temperature is even higher than the CPU has been working at high temperatures, it will VGA or burned to the possibility of cold solder joint on the big.
1. Motherboard north bridge, video card problem.
2. Screen line problem.
3.LCD problem
4, ASUS laptop repair — boot, but the LCD screen dark
Laptop repairs in this situation in the main are:
1 LCD itself is bad
2, ignition coil
3 lamp
4, motherboard
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