The dimensions of the Laptop motherboard repairing

Jan. 14, 2011 - PRLog -- The dimensions of the Laptop motherboard repairing

First the dimensions of the Laptop motherboard repairing the original is first Jane after numerous, soft hard, after the first local specific to one of the first after components.
Not to work for the board son points of two kinds: it is not have used, it is just playing out to won't work, often occur in WS and ES stage that the son is concerned, the board WS
Still need to be in open machine before moving into a series of unascertained listed do work, such as measuring confess than power to the earth of electricity resistance etc, in this was not accurately described. Another kind is is my were made by cheng causes
Don't open the board, don't tube machine in a factory professionals of measuring tried process also is in the family use in this affection condition, but also very often see this article will explain the key.
One of the maintenance method with j often:
1. Fix board the son of ask: : advisory board in the Lord with door asking out now before the shape with fault condition and the work of the state? What are the original advisory asked for caused by fault? Advisory asked Lord plate work in what fault
Environment, etc.
2. Fix plate son hope: asked that ever used this piece of main board to bottom in what department for what does exercise a with the result of not switch on after you see this after asking questions of bits in where
Use mesh measurement method observation on the mainboard of electric capacity is no have bulge, discharge or strict heavy damage, is no have been charred core slice and electrical components, the son is no where short circuit, and less electricity son yuan implement
Pieces or PCB disconnection etc. Still each slots have no clear show damage.
3. Fix board the son in medical smell: the smell is listening, mending the Lord the plate is watching, and hope to be not with the levites, look with DEBUG card ran out of the number; Don't have to pay attention, DEBUG
Card ran out of the digital not completely without by accident, it only can regard a a reference; For example, in 38 DEBUG card run columns table is "shadow system BIOS ROM" but is practical
Only is a piece of the RAM 32PIN + A3 empty welding (I'm KM22 bolt machines on unascertained have known, will be the first one piece 32PIN - the first RAM is the 13th to address the third cock) --
DEBUG card also run 38.
4. Fix plate fruit cut: no not is by hand, and is used in table and oscilloscope, 000 with million in table Lord will is to measure electric pressure and resistance, with an oscilloscope can never failed to solution sequence on the topic. Ask
Electric resistance measurement method: also called on to measure resistance value method. Can use the measurement method to the size of Yin value core piece broken cause sentenced to large and electric son yuan implement pieces of good or bad, and sentenced to broken electricity road strict heavy short
Road and continuity. Such as: using diode gear measurement crystal body pipe is no have strict heavy short-circuit, broken road conditions will judge cut its good or bad, or to the ISA slot on the resistance value will judge broken occurrence
Good bad situation, etc.
Electric pressure measurement: the Lord had measuring electric pressure if tong, but after the Lord with is often measured than a pilot board, to find out some differences in the pilot, the most after the measurement of the line (test pilot along the road runs electricity)
Finally find out a fault element, replacement components.
Through the above steps, I have too few in the amount of hand work can be finished by welding take into. But in actual had procedure, still have a lot of experience for reference, can be in a person as below: summarize maintenance step
Electric resistance measurement is the most difficult to meet to power of short-circuit situation, the signal on parallel components, by a very measure, numerous, By a tear open next to measure, vexed.

The main board dimension fix steps:
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.

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