Lenovo E530 notebook repair without startup due to water ingress

Lenovo E530 notebook repair without startup due to water ingress

Machine model: Lenovo E530

Fault phenomenon: notebook water damage no booting

Maintenance process: the whole machine has many ash layers, and the left shaft is broken. The standby current is 0.030 or so when powered on. Press Switch and there is no response when pressing Switch. After disassembling the machine quickly, the standby chip position water damage corroded by moisture can be seen.

Lenovo E530 notebook repair without startup due to water ingress Figure 1.

The burnt drum under Nand.

Lenovo E530 notebook repair without startup due to water ingress Figure 2.

Cleaning solvent was cleaned up and began to learn Hua Tuo’s bone scraping and healing with a scalpel. After a hard struggle,Cleaning solvent was removed and burned PCB layer was removed.

Lenovo E530 notebook repair without startup due to water ingress Figure 3.

Lenovo E530 notebook repair without startup due to water ingress Figure 4.

Measuring diode value 3v5v is also Short circuit. According to Current heating test Dafa, Nanqiao is also broken, and a 1.8V sy8033 chip is also burned. After all the chips are removed,Measuring diode value 3v5v is normal.

At the beginning of poor line repairing, after running the line, it was found that the lines from the upper and lower tubes of 3v5v to the standby chip were still normal, but the lines from 13 to 18 pin needed to be supplemented again. After installing the standby chip, it was found that poor line repairing Measuring diode value was normal according to the drawing.

Lenovo E530 notebook repair without startup due to water ingress Figure 5.

Lenovo E530 notebook repair without startup due to water ingress Figure 6.

Nand below there are also several lines, through the running line found a logo_LED;A plug-in headset is detected;A wake signal does not affect normal startup.After the Solder Mask was repaired, the 3v5v output was normal after the power on test. A good j8f south bridge was found, because there was no j8e bridge, we had to use this instead.Well done South Bridge Measuring diode value are normal, find a good sy8033, install Measuring diode value is also normal.

After power on switch, the current rises to0100 does not move. The test results of 35V, 1.5V, 1.0V, 1.8V have been generated, and 3v5v secondary conversion is not.Check that the susp of the front stage has been lowered, + VSB has no VCC, and the normal value is 19v, which should be caused by PCB circuit defect. It is found that 5V to 5V odd VCC is normal, and the + VSB of the front stage has 19v, so we have to switch from Jump wire on the back to + VSB converted from 3V.

Lenovo E530 notebook repair without startup due to water ingress Figure 6.

After flying the line, power on the current again to 0.400, then restart 0.8 0.9, the current has been current of change, after connecting the screen, it has been booting up.

Lenovo E530 notebook repair without startup due to water ingress Figure 7.

The installation test found that the network card board was plugged in with the current of 0.080 or so. It seems that the network card is also broken. Remove the small board and remove the broken network card rtl8111f. After looking for it, only rtl8111e was checked in the forum. Some said that it could be used instead, while others said that it was not. Only after he tried, did he know.Install a good network card, boot into the system and test that all functions are normal. The voice is on the Internet. The keyboard is also broken,By the way, use AB glue to stick the broken left shaft for him. The repair is over!