From what I've seen you fixed on defect Smartphones I think there is no reason why you should only stick with fixing laptop power issues Waleed! The used components on laptop mainboards are about the same size or even a bit bigger which shouldn't make that much difference. Have a blessed day too!

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Thanks for your much appreciated reply Yogesh. I read your recent article about the Super I/O controller. And it probably explains why the seller/manufacturer wasn't able to answer my legit questions about the meaning of the 6 and 8 digit codes he used. I also wondered about the value of the Diagnostic card using the USB port to check if a device is okay. Because if the device is dead it surely won't work anyway, and any message saying that everything works fine is that what I already knew! Maybe I'm still able to fix the defect Acer 5520G mainboard the old way but the tested replacement board will arrive any moment now.

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We must use "DSO" for fault finding in proper manner if having reference of signal details of the motherboard.

Remember while cold testing (Mosfet)remove the additional units fitted on the motherboard like WiFi module ,CMOS Battery, RAM Module and Off course CPU it self specially if you are testing VRM section,else multimeter reading always Misguide us.

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Thank you for your valuable thoughts on using these diagnostic tools or not when we just replace the components we think are at fault Graeme! Maybe the Qiguan PC test card Kqcpet6-B version 8.0 with Bluetooth connection in my article will be of more use if the many PC slots of a Desktop computer are checked? And the CPU socket testers are only useful if we suspect a problem with the mainboard CPU socket. But the Chinese instruction manual of that socket tester on two A4 pages was just Chinese to me and translating it gave wierd results and no answers at all.

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Sure Chaz. It is easy to find with Google on probably more places too. Look here =>
https://vdocuments.site/scheme-acer-aspire-as5220-5520-7520-7220-icw50-la-3581p.html

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The replacement tested mainboard is on its way and will fix the now completely defect Acer 5520G laptop, Mark.
In the article I mentioned how difficult it is to log in on Chinese Baidu or other Chinese websites for not Chinese buyers. But good to know is that recently Microsoft launched a free App that fixes this problem and we now easily even without registering by phonenumber are able to log in on those websites! And by adding the Google Translate extension to your browser the Chinese language doesn't have to be a barrier anymore either.

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Yes, I agree! I too have burnt my fingers in buying some useless tools! Unfortunately, no guidance will ever come from them!

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