Laptop Motherboard repair steps
Laptop Motherboard repair steps, First used electric resistance measurement method, measurement of power supply, interface 5V, 12V, etc
1. First used electric resistance measurement method, measurement of power supply, interface 5V, 12V, etc. On the ground resistance 3.3 V, such as fruit didn't have to land short-circuit, again carries on the next step of work.
2. Plus electric (pick on the POWER interface, but according to POWER after open closed) to see is no can boot, if not to boot, fix open electromechanical road, if can boot again on to the next step.
3. Measuring try CPU supplying electricity, core electric pressure, only to CPU supplying electricity and no more than ever 2.0 V, can add the CPU (front with carrying is eye test on the mainboard didn't have electricity let bulge, discharge), with
When the motherboard outside frequency and octave jump line (the best watch a dance well under CMOS), see the CPU is no can work to C, or D3 (C1 or D3 for measuring try card code, said the CPU
Has the job), such as fruit don't work on to the next step.
4. When the CPU take down temporarily, add the dummy loads, strictly according to the grid as material test pilot, try every item for electricity measurement is no are often. Such as: core electric pressure 1.5 V, 2.5 V and 2.5 V and PG
SLOT1 of 3.3 V, such as is often reentry a little work.
5. Root according to data on the pilot test try when measured out is no are losing clock, often when losing a clock 1.1-1.9 V, as is often on to the next step.
6. See measuring try on the card is often RESET the lamp is no (positive often when to boot instant, lamp will flash, however, when we after extinguished short-circuited RESET jumpers, parade
With the number of short-circuited times a glowing, such as lamp often bright or come often are no complex bits. ), such as GuoFu bits are often again on to the next step.
7. First measured BIOS CS piece selected signals (for CPU first a refers to make choose signals in), low electric ping has effect, however after measuring try BIOS CE signals (this letter number shows the number according to the BIOS
Put in the stockings total online) low electricity flat have effect.
8. If these steps also don't work, the first mesh plate is no have measured the Lord break, but after the BIOS cheng sequencing refresh, check the CPU inserts seat contact is no good.
9. If not in accordance with the above steps, only with natural tube with a minimum department tasseled method inspection repair. Steps for: to replace the I/O + occurrence + north bridge
10. Inspection measuring interface electric road: check fix interface electric road, with a sort of electric resistance measurement method often tube use. A sort interface electric road damage
Is the back surface resistance, electric capacity and electricity are damaged more.
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