Dell Laptops Have Shocking New Problem 475
dapsychous writes "A friend of one of my coworkers has noticed a problem in Dell notebook computers (also covered in this engadget article about a problem that has been popping up lately in Dell 17" notebook computers). It seems that these computers are putting out between 19 and 139 (65 according to article, 139 according to him) volts of AC power as measured from any chassis screw vs. earth ground. This has led to several problems including fried ram, blown video circuits, and a stout zap on his left hand.
According to him, Dell has tried to keep him quiet about the problem and has even gone so far as to have him banned from a few websites, and threatened him with legal action if he tells people about the problem."
just fix the laptop and stop screaming (Score:3, Interesting)
is Dell that bad at support nowadays? or is it just another "call me Bob" who has no clue who he's working for this month overseas and doesn't care?
Macbook has same problem (Score:5, Interesting)
I had this problem years ago with a Dell Laptop (Score:5, Interesting)
Anyway, the user was complaining about power issues with the laptop - things like it sudenly shutting down, starting up by itself and running the battery down, etc. Then out of the blue, she said, "and it's shocked me a couple of times." Like that's expected behavior.
I was somewhat skeptical about this, and figured it was a static problem or something unrelated but found out the harsh truth while I was on the support call with Dell. They had me do the usual bonehead stuff like do a hard reset, update the BIOS, remove/replace the battery, etc. I was typing on it and got zapped on the thumb with a serious shock. That's when I noticed the little scorch mark next to the right trackpad button. Looking down through the gap between the button and the case, I could see a little bit of metal from whatever was underneath. Enough charge was building up in there to arc to my hand, which can't be good.
The Dell support guy heard me yelp when I got shocked and asked me if everything was OK. I told him I just got a nasty shock from the laptop and he said, "can you hold for a minute please?"
I waited for about 2 minutes, and then some other guy came on the phone and said that they were sending out a replacement overnight and that I should return the other one right away. The replacement was a top-of-the-line Inspiron for the time, quite a step up from the one that zapped me. I figured it was a pretty good response.
So I issued the user a new Thinkpad from our closet and kept the nice Dell for myself. It worked out for everybody.
I had this problem too (Score:3, Interesting)
Normally I would have been happy, but the new system had inferior graphics and disk drive, and was incompatable with the upgraded RAM in the old system. Dell would not reconcile the issues, and just had their tech support deny my claims.
Re:What did he expect? (Score:1, Interesting)
Re:Non-repro? (Score:5, Interesting)
Re:37VAC on 15" Dell (Score:2, Interesting)
Re:Oh shit. (Score:5, Interesting)
If they are providing an un-grounded adapter then they should be sure that no external metal components can connect to the line neutral, because while that should ideally be at ground potential, the power spec provides for the possibility of it floating. I'd also like to see if he is shocked by the old setup if put on an isolation transformer.
-nB
Re:How about ... (Score:2, Interesting)
"I trust many big companies because they provide quality products and never tried to screw me, and I trust even more small companies, and if you think about it, I'm sure you do too."
Hmmm. I trust many companies too, for the same reason. If they've given me no reason to not trust them, and have taken steps to earn my trust, I tend to
How is the little restaurant down the street disposing of it's waste? Are they recycling, re-using and reducing to the fullest extent? Do they pay their employees shit wages and leave it to the customer to make up the difference with tips?
How about that newspaper vendor you stop at on your way to work?
Does he beat his wife? Cheat on his taxes? Where does the owner stand on abortion?
Do you look in to his character before plunking down that fifty cents down on a newspaper?
If not, why not? I guess you didn't catch the part in my comment about the hair cut, or the pub or restaurant. Or do you go to Wallmart for a haircut? (I don't know. Maybe you do.)
I could have named local establishments that I do business with, but the parent poster has likely never heard of them. Instead, I named companies he might have heard of and provided links to articles describing why I think they deserve my business.
Does your local farmer's market pay their employees good living wages, offer health care and other benefits and only sell products produced in accordance with your high moral standards? Can you really vouch for every jar of jam, every piece of fruit? What makes you have to resort to name calling?
More importantly, should the fact that I think you're an asshole have a bearing on whether or not I buy a pack of gum from you?
Re:Oh shit. (Score:3, Interesting)
Re:Verified (Score:3, Interesting)
Switching to a grounded adapter supply may have just fixed the problem by switching to an adapter that is properly constructed.
Re:Oh shit. (Score:3, Interesting)
Here's one: Dillon Precision [dillonprecision.com], home of the "Blue Press" - a reloading catalog liberally sprinkled with beautiful women holding firearms. What makes them great is that they have a Lifetime "No-B.S." Warranty on their gear - a part breaks, you lose a spring, no problem, no charge!
Excellent customer service, IMHO, and pretty good reloading presses.
Re:Ever? (Score:2, Interesting)
That's why they carry their own UL listing. The UL listing is UL's means of saying that if that part ever fails, it won't fail in a way that can cause personal injury. These are not like normal caps. They have a very thick dielectric, and are epoxy encapsulated. Every cap is tested at mfg, it's automated. Then the final assembly is tested.
And a loose solder joint? They kinda go open, not shorted.
It's the other parts you should be concerned about, and those I never touched on. Blown FET's shorting to frame ground? check. Overheated transformers breaching the primary to secondary boundary? check. Pinched wires? check.
Electrical Problems aren't all that uncommon (Score:2, Interesting)
I was handed a complaint that someone was shocked on one of these PCs. And, on testing, there was a potential of 75-150 volts between some of the exposed screws and earth. BUT, and this is the important point, the current was in the milli- to micro- ampere range. So, it meant that the electricity was perceptible, but not dangerous since the current involved was below the accepted threshold for danger to humans.
On the other hand, a spark, any spark, on an oil rig is not a good thing. The final result was that the PCs continued to be used in the office, but were banned from the oil rigs.
The above comments with respect to the current may not be the same as the situation reported in the original article, but I'd be curious to know what the measured current actually is.
When I measured current on the machines I tested, I started with the meter in it's highest possible current setting and gradually worked downwards to more sensitive scales to make sure I didn't let the "smoke" out of the meter. But if you're not sure about the method, don't try this at home kids.
Re:Bogus: The real explanation (Score:3, Interesting)
(Yes, IAAEE, and yes, one of my current [no pun intended] projects involves developing a device to zap humans - we EEs are our own most handy test subjects. Somewhat off the topic, the Big Boyz of the human-zapping industry set their 'danger zone' at around 10mA, give or take a little depending on pulsewidth, etc. Once you pierce the skin, human body resistance drops to only a couple Kohms...)