My DELL D400 power adapter went off. Of course in the moment I needed him most. No green light, no power, just some silent beeping. So I decided to buy a new one. But since it takes quite a long time to get original Dell adapter, I instantly bought Trust Universal Power Adapter PW-2120. I have also verified, that this adapter is suitable for my laptop.
What a surprise - after setting the appropriate voltage and turning the notebook on - the adapter was working, but the battery was not charging. I did some googling and found out, that it is not a bug, it's a feature. It seems, that DELL is using some special chip inside of his adapters to ensure, that only original accessories is used. I've tried it on my second laptop (HP Compaq 6710b) and everything worked fine.
So I've understood that resistance is futile and ordered another one brand new DELL PA-10 Power adapter.
