Dell Latitude e7470 plugged in not charging

My work laptop began not recognizing its charger cable. I tried a bunch of alternative chargers and mostly it didn't recognize any of them although interestingly there was one it would charge from for a while before it stopped charging from that one. I had some fear that perhaps the laptop was damaging each charger I tried it with, but I have been too impatient to systematically rule that out. Somewhat disorganized testing seems to have shown that the chargers are okay. A whole lot of research has revealed that the charger identification is done through the comically tiny center pin of the charger plug, and interestingly the charge power delivered through contacts the inside and outside of the outer ring. I learned that the communication on the center wire is a protocol called "one wire" which seems like a particularly sketchy system. It talks to a memory chip of all things in the charger, and this chip is called "The Dallas Chip".

Here is the final evolution of my Google searches for this issue. This one produces the best links: https://www.google.com/search?q=dell+latitude+e7470+plugged+in+not+charging

Here's the basic debugging chain presented as a funny video: https://www.youtube.com/watch?v=XjB48jGjUVg

The debugging chain offered some hope in that the problem could be in the plug in the laptop, or the cable between the plug and the motherboard. So I got a cable and installed it but sadly this didn't fix the issue.

Here is the cable on Amazon: https://www.amazon.com/Eathtek-Replacement-Latitude-E7270-DC30100VI00/dp/B07HK61LDW/

I accidently lost a lot of my research trail when my browser crashed, but here are a few more links:

This is the mother of all google hits for this problem. It describes the cause of the problem and actually shows a person debugging the issue finding the Dallas Chip in a charger. It also has a link for stand-alone external battery chargers for Dell batteries, which is pretty much my only hope since the problem seems to be on the motherboard rather than the charger so I have to find a way to add charge to the battery for the moments between when I enter and exit the laptop from hibernation mode:
https://www.laptop-junction.com/toast/content/inside-dell-ac-power-adapter-mystery-revealed

A netbook for a 4-year-old

My goal was to get a small, cheap laptop for my 4 (soon to be 5) year old to use for accessing the two or three websites that she presently likes, that could be hardened to prevent accidentally going to other websites until she actually wants that capability (like in about 6 months), and is modern enough to actually play videos etc at full speed. Here's an article from the dusty, ancient year of 2009 that covers this question:

http://blog.laptopmag.com/kids-netbook

Option 1 is the Disney Netpal, which supposedly has parental controls simple enough for even a dinosaur like myself to set up without it becoming an all-night project. The downsides are: It's pink, and it's pretty tiny (10.1-inch screen). They made a blue one as well but only the pink ones were popular enough to show up on eBay these days.

Option 2 is just a different netbook that I install some kind of parental control software on.

The Netpal is no longer made, so old stock at online stores is now oddly expensive. Units being sold on eBay were in the right price range though.

The netbook market these days has shaken out into two or three brands at most. If I'm going to give up on the Disney package, I also might as well go for something slightly bigger. That pretty much leaves the Acer Aspire One line (Asus, the maker of the NetPal, has a few options but most of them are in the 10.1-inch form factor).

Also, very unfortunately, it is already becoming difficult to get laptops with anything other than Windows 8, so I am already being pushed into the Used market. Searching for Acer Aspires with Windows 7, I liked this 11.1-inch one the best:

http://www.amazon.com/Acer-Aspire-AO756-4854-11-6-Inch-Netbook/dp/B0083PR78M/ref=sr_1_1?s=electronics&ie=UTF8&qid=1355682002&sr=1-1&keywords=acer+aspire+ao756#productDetails

I didn't need the 500G hard drive, but it did seem to come with a professional copy of Windows7 and more RAM. The model number A0756 seems to cover the basic model, and the particular combination of hardware and software options is varied by the style number 4854, which seems to allow for all kinds of variation of processor, memory, hard drive, and OS. Here it is on Ebay:

http://www.ebay.com/sch/Laptops-Netbooks-/175672/i.html?_from=R40&_nkw=AO756-4854

Apparently, the 2899 model is much more humble, with a 32-bit Windows 7 installation, less HD and RAM, and a Celeron instead of a Dual Core processor. However, it's also about $200 less and this is mostly for use over just the coming year so this might be good enough:

http://www.ebay.com/itm/Acer-11-6-Aspire-One-Netbook-877-1-4Ghz-Dual-core-2GB-320GB-AO756-2899-/271115648294?pt=Laptops_Nov05&hash=item3f1fc07d26

And because Google makes it possible to find *anything* online, here is the side-by-side comparison of these two models!

http://www.shopping.com/xSBS-acer-acer-aspire-one-11-6-netbook-2gb-memory-320gb-hard-drive-ash-black-acer-acer-aspire-one-ao756-4854-ash-black-intel-pentium-967-1-30ghz-11-6-4gb-ddr3-memory-500gb-hdd-netb~PRDLT-127171921-133374655

So, what kind of parental control software to get? What I need at this point is just simple whitelist control. Most software of course is much more feature-laden than I need. I don't need content recognition, keylogging, etc, at least right now. Here are some reviews that do a good job of showing the entire spectrum of options:

http://www.pcmag.com/article2/0,2817,2346997,00.asp

http://lifehacker.com/5868750/how-do-i-set-up-non+annoying-parental-controls-on-all-my-devices

Whitelisting is apparently easiest to implement at the router or DNS level. I'm not sure that I am ready to do all the work necessary to implement this, but I've found some products that both implement it and have easy hole-poking options for "parental" use:

http://www.pcmag.com/article2/0,2817,2353883,00.asp