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Category Blog

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.