Have you tested it with the output cable disconnected? I have found a few times that the cables have been internally broken near the end and in some cases shorting out.
In terms of the "missing" cap, well it was probably a design option, just in case they needed it for EMC compliance or something.
No I haven't because I don't think that's the case here. What tipped me off was the LED power indicator was also pulsing and very dim.
btw, nice job getting in - some of those cases are a bitch to open.
This one was really quite a bitch too, but I managed to crack it open with a flat blade screwdriver.
There was a lot of hard glue inside to keep it closed, I'm just glad I didn't rip anything off the board especially the BR and the regulators since they're stuck to the metal cage for heatsinking.
I don't think the adapter is the original adapter. The input line noise filtering and EMI shielding are non existence, line choke missing etc. More likely a piece of cheap adapter of unknown origin. Therefore there is not a need to be concerned with X or Y capacitors unless your neighbours complain of line noises from you. But likely they wouldn't notice it anyway, and if they ever did, they would more likely blame the Grid.
Yes you're right. My bag along with some external HDD, mouse, laptop adapter, etc was stolen and I only had my laptop on my person at that time. The original laptop adapter was very robust, the brick is big, wires are thick and the connection is tight and inspires confidence.
This adapter is a Grenosis universal laptop adapter. It comes with an array of output jacks for different laptop brands and output voltage.
There is actually shielding, I took it apart. The shielding is two parts - one stuck on the board as heatsink for the regulators (with thermal paste) and the other was stuck to the adapter brick body. They close like a clamshell.
I've actually had bought 3 different adapters, the other 2 was pretty shit. They both had some leakage that I can feel on the laptop body. This current one that I opened, even though looks pretty shit, is actually the best out of 3. It feels good in the hand too when I pick it up, feels solid and have that hefty weight to it. No current leakage on the body that I can feel.
But yeah there's no perceivable noise when the laptop is plugged it.
In particular, check the cap which supplies power to the controller IC, and yes, low ESR is a requirement and not all caps are today. Visit badcaps.net for (much) more information.
Thanks a lot, they are a good source of information.
Throw this piece of crap into waste bin. It's non original or counterfeit charger. Distance between primary and secondary is tiny, this crap is simply dangerous.
Yes it's a 3rd party charger.
I don't have any better one at the moment, and I went to Acer store for an original adapter, they said they don't sell them, only laptops.
I looked through eBay and none of the "genuine" and "original" adapters look like it.