Hi guys! I have the laptop ACER V3-771g no power at all no 3v no 5v, the laptop have the first battery charger BQ24725.I take him down check 14pin groud with other pins not shorted, but on motherboard when came to solder this ic actualy the vcc pin 20 and pin 14(gnd) are grounded.If I tested with multimeter for sound(diode test) multimeter sounding.But on this pin 20(vcc) on mobo came 19V. I have a schematic of motherboard give in attachment, BQ24725 pdf attachment to. Problem is that this motherboard doesnt have prited componets on her self, so I cannot found from where to where going something.Board...

Hi friends !

Have somebody idea how to test this ic chip, charger in acer aspire v3. I suspect that is not work ok.On VCC came 19v but from him nothing, i take him down from mobo beacuse something is shorted, beacuse doesnt have either 3v and 5v from TPS.

So how to testing it down from motherboard,I think inject directly 19v on VCC pin but anyway ask for advice.

Chip is in pdf.

Thank for help!...

Re: asus x55c schematic needed

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Re: acer aspire v3 Q5WV8

Here is schematic....

Re: acer aspire v3 Q5WV8

I am new here how to upload schematic?

Hi frieds.I have to repair laptop motherboard from acer v3-771g the motherboard is PEGATRON va70/vg70, I have schematic but motherboard doesnt have prited marks near componets.So schematic is usless.Any idea? Or someone who can help?

Motherboard doesnt have power at all no 3v no 5v only 19v on few componets,rest of components read max 0.77V. Even on chip TPS for 3 and 5v on vin came 0.33V.

Laptop is from my friend adapter die,he replace with another but he is bad electrian and he connect positive and negative together.So fried mobo. I check visible nothig to see fried...

Re: acer aspire v3 Q5WV8

Schematic is no problem.Problem is that is motherboard without marks of components.I have to for repair this mobo v3-771g, with the same symptoms no power at all,no 3v and no 5v totaly dead but cannot find boardview.

Re: acer aspire v3

The same prolem with all v3.I foud schematic,ut cannot use.Motheroard dot have marks of components.