[symbol]: huashu p5g41t-m lx3
[facilitation phenomenon]: monitor does not show
A client brought a piece of board p5g41t-m lx3 plus a few days ago describing the failure as a failure to show that it was able to turn on, that it was simply measured, that it was running with a normal running code but that the monitor was not light。
Maintenance:
Try the outside. It'll lighten up. Look behind the vga interface. There's no burn or hard wound. Is it a bridge
If you don't put your hand on it, you blow it or you don't do it. Think about it, you can see the bridge is good. The problem is between the bridge and the vga mouth。
An unwelded vga connection ran the definition line and identified key measurement points for measurements 1, 2, 3, 9, 12, 13, 14 and 15。
The electrostatic of the voltage at the points below, the measured output-end direct flow gauge of three-base colours with no voltage, and the communication was measured at approximately 5v each, are normal. The vga12pin data foot is then measured with a normal voltage of 5. 13。
Another 15 pin clock signal is also normal for 5. 13 v。
Continue to measure the vertical synchronous signal of vga14pin with 0v - abnormal。
Finally, the synchronous signals at vga14pin level are measured at around 3v。
The result of the vga14pin vertically synchronized signal was found to be 0v-unusual。
The electrocution of the diode slot was measured at only 13 with a b and c extreme barrier, and they were separated from one pole with a small electrical cap, removed from their capacitor or short, and replaced directly on the plate with a tube marked a7t, directly to the monitor。
The above elements are selected from the rapidity of repairing various mobile phone digital, computer/bookboard cards, data recovery, tablets, etc。
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