I recognise through browsing forums that the problem I describe is not wholly new but I have tried some of the suggested solutions without success.
I have two identical Inspiron 1501 laptops which have failed in exactly the same manner within 1 week of each other.
The basic problem is that the laptop will no longer recognise the AC power adaptor and hence will neither power the PC nor charge the battery. For both PCs the failure mode was pretty well identical as follows:
1) The power adaptor shows a green light and a multimeter shows DC power being output
2) I have previously repaired the power adaptor at the connector end where flexing had broken the connections ( a common problem of poor design). It had subsequently worked OK charging the batteries in both machines for about a month
3) The laptops then intermittently showed the battery green light as charging then not charging. This appeared to be solved by fiddling with the connector but eventually this failed to get any indication on the laptop light.
4) One laptop stopped seeing the charger whilst the other one would still see the same charger for about another week
5) With a charged battery the laptops appear to function perfectly in all other respects
6) Both batteries were in good condition and would charge normally and hold charge for several hours
7) I have had the sockets on both motherboards professionally replaced as I suspected a poor connection but still get no indication of power to the laptop
😎 As suggested in one forum I have updated the BIOS successfully on one laptop but this had no effect
Having read many forums they tend to suggest replacing the motherboard but this is an expensive option I am not willing to take until I understand the failure mechanism. If a device has died on the motherboard I would have expected an instantaneous failure mode not an intermittent one. I could buy a new AC adapter but again I don’t understand why this should work. Can anyone please give me a view on the failure mechanism or I could end up wasting a lot of money!
How long ago did you have the jacks replaced? Most reputable shops will warrant their repairs for 90 days at least. Otherwise, if you're certain the adapters and batteries are OK, the only thing left is the mainboard. There are hundreds of cold solder joints on a mainboard - and many components that can fail.
I've only just had the jacks replaced as I suspected poor connections because of the intermittent nature of power getting through. At the time of changing them nothing was working so it was an attempt at a resolution based on the nature of the failure mode. I agree that the motherboards are suspect, and there are potentially hundreds of possibilities but an identical failure mode would seem to point at the same component. For the cost of replacing two motherboards I might as well throw the machines away!
Same here... I've also seen many post on this issue.... and have gone thru everything mentioned above.... I'm very reluctant to replace the motherboard since this issue may arise again with the new board.... last hope is to sell the laptop as is on eBay and hopefully is someone buys it they can fix it. I'm done trying....