I'll inject a different, but related question here. I, too, have this problem with my e1505, on the second adapter (PA-12). Should I go with a PA-10, and/or is there any Dell adapter that works with this laptop and will last beyond a year or two? I'm pretty sure a failed ID chip is the problem in my current adapter. It's gotten progressively worse. As of today, it just powers the computer, but won't charge my battery. For the past several months, it has charged the battery intermittently. Thanks.
The PA-10 will be fine.
The ID chip can be fried by an EMP because the cable is not shielded. Possibly even a power surge will kill it.
The single biggest killer is rough handling of the adapter - more specifically, the power cable. Out of thousands of these I've worked with, very few have inexplicably failed - people wrap the cord too tightly around the adapter, bury the adapter under a pile of insulation, or are too rough with the DC cable side.
The battery not charging isn't so much my problem as the crippling of my cpu. This makes gaming and media unenjoyable, and renders the computer useless. Please tell me how to reinstate my original processor speed despite the a/c adapter, so that I can have back the computer that you so willingly took my $800 for.
My AC Adapter stopped being recognized to and my CPU Speed was reduced to 600Mhz. Did a lot of research on the net and finally found this tool, which worked for me: This Notebook Hardware Control (http://www.pbus-167.com/) restored my CPU Speed to normal 2Ghz.
Some Background Information about Dell AC can be found at Laptop Junction: http://www.laptop-junction.com/toast/content/inside-dell-ac-power-adapter-mystery-revealed. Really Interesting.
Hopefully this works for you too.
Laptop batteries have microchips embedded in their charging circuitry. These microchips communicate with the laptop's motherboard BIOS. If the AC adapter doesn't provide the ID signal mentionned by KirkD, then the microchip will not communicate with the motherboard circuitry. Also, as previously mentionned, the motherboard's power connector can become damaged. This can prevent necessary connections from functionning or communicating correctly. I am sitting here watching an XPS M140 run diagnostics. Its battery had become fully discharged and would not recharge due to a thrid-party AC adapter. I replaced it with a genuine Dell replacement purchased from an online laptop parts supplier at a very reasonable price. It now shows a 100% full charge.
A good analogy would be a "universal" remote control. If you do not program the remote for your specific TV, VCR or DVD player, then it may turn those devices on and off but not allow you to use all the functions available with the original manufacturer's remote.
Simply put: Laptops are very sophisticated and complex devices. When repairing them, we only use exact replacement parts. Experience has taught us that using "compatible" parts can be both expensive and dangerous. Some of the laptop battery fires and explosions you've probably heard about or seen on the nightly news were caused by the use of "compatible" power supplies.
By the way, "we" are not Dell employees. We are independent techncians who share our knowledge and experience with Dell products with both Dell employees and users of Dell products through this Community Forum.
Below is my reply to a similar problem: It might help.
Gone are the days of simple laptops. Dell laptops require Dell battery chargers and are designed to recognize them. If the power adapter port on you laptop is damaged (by inadvertently pulling or jerking, etc), it may fail to identify the battery charger and refuse to charge the battery. This happened to me. Fortunatly, my 1737 has a daughter card which holds the charging port and related electronics. I only had to replace it rather than replacing the whole mother board. $15 vs $300. Hope yours is made the same way!
And WHEN will computer makers design an external power supply port that is ROBUST!??? or do the just love the repair income...
The only ROBUST power supply connector I've ever seen was the one used on a Macbook model. It used an RCA plug. As you know, the RCA plug is an antiquated but reliable connector. Usually the wires pull loose or break before you damage either the male or female connector. Another pet peeve of mine is why there is no standard DC plug for electronic devices, and why bridge rectifiers are not used on DC inputs. With a bridge rectifier the polarity of the tip and ring of the connector is not important so even an AC power supply of the correct voltage and amperage could be used. The ONLY device I've ever seen with such a power supply circuit design was a Heathkit 2-meter handheld radio kit sold back in the 70s.
@meiser: This program looks hopeful! But I'm stuck on getting to force settings. Can you explain more about how you got your speed back?
HAH! It works! I didn't use NHC, but the CPU Rightmark clock Utility is doing the trick!! Find it here -> http://cpu.rightmark.org/ Nomore throwing extra $ at Dell! @Dell: Keep your lousy warranty! (sorry, just a "lil" bit excited to have my pc back at full speed)!! 😄 😄 😄 😄
Thank you to all that were supportive and helped! Trolls, you were wrong, sorry, no lovely parting gifts. lol 😉