Member Avatar for SUSIE07

My Dell Inspiron 1100 died a few months ago I initially had a broken power cord. Then I took it in and it was diagnosed: new motherboard replacement. However, I have seen many messages saying that it is the power jack failure that causes this particular model to go dead. Should I change both the the power jack and the motherboard or just the motherboard. Which repair should I do first ( to save time and money)?

Thanks. Susan

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Short, practical plan that combines the two replies here. is right that the DC-in area is a common failure on this model, and is correct to suggest validating the fault before committing to an expensive board swap. The cheapest, lowest-risk checks come first; only move to a full motherboard replacement if those checks point to the board itself.

Try these low-cost, non-invasive steps first:

  • Use a known-good Dell-compatible adapter and cable (or have a shop try one) so the wall brick is ruled out.
  • Remove the battery and try to power the laptop from AC only; note any power/charging LEDs, fan spin, or drive activity.
  • Look inside the barrel for a bent pin, cracked plastic, burn marks, or corrosion — and see whether gentle movement of the plug causes the state to change (intermittent power when wiggled points at the jack area).

If those signs point at the DC jack/harness, replacing that assembly is usually far cheaper than a motherboard swap. If none of the quick checks show a jack issue, get a shop to do a short diagnostic and request a parts vs. labor quote before they order a motherboard. For a DIY route, source the correct DC jack/harness part for the Inspiron 1100 (harness parts often cost much less than a full board) and follow a model-specific teardown guide.

Final note: because the Inspiron 1100 is an older machine, compare repair cost to the value of the laptop. If repair isn't economical, salvage the hard drive (use an external enclosure) or keep the unit for parts.

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Member Avatar for sittas87

Ola Sussie
Id say the PowerJack.However if the prob still exists then you can replace the mobo,doubt its te mobo though

Good luck feel free to ask any other q's

Member Avatar for EMCCleveland

It really depends on if you plan to do the repair yourself or not. If you feel comfortable taking apart the laptop then disassemble it and remove the motherboard. With a $10 multimeter you can run continuity tests between the DC jack and points on the board to see if there is any problem. Also the signs of a cold or broken solder joint are able to be seen with the naked eye by just looking at a board. If these indications aren't present it's motherboard replacement time.

If you opt to do this make certain to use little cups to put screws in from each "stage" of disassembly, ie outer cover, motherboard, or look online for a guide to taking it apart.

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