Hi!
I purchased 3 Arduino Nanos from here on Amazon and aren't working. I guess it's my fault for not getting a genuine nano. When I plug them in, they don't even turn on. Maybe the serial communication board is broken. So sad though, now I'm stuck with big Unos and a Mega (from ELEGOO).
Is there any way to fix this?
@anon44338819
You can do some basic fault finding.
Attached the schematic for a clone with CH340 that was once posted on the forum; you can use it as a guide for checking. Note that your clone might differ.
nano_ch340_schematics-rev1.pdf (851.9 KB)
Real fixing is not really worth it; you need determine which components are broken, buy new ones and solder them. I would return them once I have determined that it's not the cable.
@TomGeorge , that doesn't help if they don't switch on 
Hi,
Can you please post some images of the Nanos, both sides would be great?
What happens if you apply 5V to the 5V pin of the Nano with respect to its gnd pin?
Do you have a DMM?
Thanks.. Tom... 
It's a long shot, but a common problem - did you try a different USB cable? Many the hour has been wasted fighting with devices downstream, when a defective cable was the root issue.
C
Let me just say that when I refer to "it", I mean "all three" 
.
No. All lights are off.
All soldering looks good.
There is no 5V or 3V3 output, also with a different cable.
On all 3, the power LED comes on, but when pressing RESET, the pin 13 LED does not flash.
They don't even turn on, so the IDE is useless.
[quote="TomGeorge, post:5, topic:1027257]"]
Can you please post some images of the Nanos, both sides would be great?
[/quote]
https://drive.google.com/drive/folders/1lwKbis2rNmW_G6eYaHpvqxTunVNhCXU9?usp=sharing
Only an analog multimeter 
.
Yes, same thing happened
My conclusion would be that the diode (SD101CWS) is missing or broken or a bad soldering of the USB connector. If you connect the USB and feed 5V into the 5V pin, does your operating system pick it up? It might not be recognised as a TTL-to USB converter yet (that is, if you use Windows; you will need to install the driver) but it should show as something.
If that is "press and release the reset", it sounds like no bootloader. You can burn it if you want to and see if that solves that problem.
Have you looked at the comments from purchasers?
Seems they are faulty, just get them replaced.
Not sure what your point is with the images of all three - using a bad cable could be the common point of failure, which was my point. But as others have pointed out, it could also be defective product; I've not had any problem with the clone market, but I've only made 2 purchases, plus the original 5 I was gifted, so my data is limited. I've re-loaded all of my clone Nano units with the modern bootloader, and all work fine (other than the two I toasted, one with a 'reverse' install, one with an even dumber move).
C
also if nothing fixes you re stuck with UNO (because theyre same with diffrent pcb and USB)
Hi, did you install the CH340 driver correctly?
Why, just exchange the faulty ones.
Please enlighten me how that helps if the board does not even get power.
Never mind, I see what happened.
i think you burn it when trying power ant test other things?
