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yx

yx

  • Joined: 2021-11-01
  • Articles: 558

Apple a1502 laptop screen does not display maintenance

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Apple a1502 laptop screen does not display, q7700 P channel venue has not been connected, G level has always been 12V, began to measure and chip connected components,diode value are normal, dismantle a same model of comparison found, r7720, r7721,VCC is not normal, decisive change,booting up success.

Repair of Acer a315-55g notebook without CPU VCC

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Acer A315-55G notebook without CPU power supply maintenance: plug in the adapter, power on, repair the CPU power supply before starting up, measure the ground resistance of the next 13 pins, and find that the short circuit to ground is 0 Find a 10-ohm resistor and capacitor from the material plate and change it to measure the resistance of this foot to the ground and return to normal Plug in the adapter again and power it up All power supplies have been connected normally, and the screen lights up successfully.

Repair of MacBook a1932 water damage fan running wildly

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MacBook a1932 water damage fan ran wildly and did not recognize the battery. Using Apple's online diagnosis, it was found that there were two faults error code. After checking, it was found that the line from q6950 to r6951 to battery BTB connector was broken, and a wire was lost to solve the problem.

Repair of Raytheon tr-g150t notebook no booting

Raytheon tr-g150t notebook no booting, first scraper maintenance, scrape to the common point diode value becomes normal, power does not Short circuit;U41's 1 pin VA pin is disconnected, make up.Isolate the Current protection tube pq47 pq18, and connect the DS pin of pq30 pin directly to make them fully connected.Configure me, brush BIOS program, and then boot, normal.

Repair of ASUS fx86f notebook Won’t Turn On

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ASUS FX86F notebook can't be turned on to measure each inductance without short circuit When PM_SUSB/C # is disconnected, the current does not jump. It is found that the power supply of VCCIO is abnormal After being removed, it is powered on to 0.15 and does not jump. After repeated confirmation, it is the problem of APW8715 chip The replaced chip is powered on and booted to test the perfect bright machine

Lenovo Xinchao 7000-13 laptop no booting maintenance

Lenovo Xinchao 7000-13 laptop no booting maintenance Machine model: Lenovo xiaoxinchao 7000-13 notebook Fault phenomenon: notebook no booting Maintenance process: Lenovo Xinchao 7000-13, plug-in adjustable power on no power on, no standby.Remove the back cover, unplug the COMS battery and…