The Dell Latitude 7240 is Dead ... please help me diagnose it

[dud]

My Dell Latitude 7240 (i7, 16 GB RAM) died on me last week mid-use and I am in the first stages of trying to diagnose the problem. I am hoping that someone can help diagnose the problem using the following evidence:

- The laptop was on A/C power with a fully charged battery when it abruptly shut down. The shutdown was instantaneous.

- Everything I have tried to-date has failed to elicit ANY life from the laptop. I have tried the recommended taking the battery out, pushing the power button for 30 sec and re-inserting the battery ... nothing has fixed it.

- Interesting: When I plug in a known good adapter the light on the PS dims or goes off. I've tried two (2) good adapters and one, a newer Dell 90W PS actually shuts down, the light goes completely out and the only way to reset the PS is to pull the plug and reinsert it.


I am beginning to think that the laptop power system is shorted and the PSs are shutting down to protect themselves.


Would really appreciate any guidance or advice with this before I decide to replace the unit. That would be a shame as the 7240 is super fast and in mint condition.

Thank you ...

 

[C1]

Seems that there are a number of power on complaints of a similar nature seen on the network posted forums for your model.

In all liklihood the motherboard would need to be replaced which is not a cost effective solution.

Based on what Im seeing with the Dell model you have, I recommend not trying to repair or replace that particular Dell model, but instead invest in a different model Dell or another brand.

Sorry

 

[fire400]

cost effective solution? order the part from eBay for $50, and do it yourself.

otherwise buy the laptop again for $100 on eBay.

this is like pocket change compared to what modern-premium laptops and motherboards cost, brand new.

modern equivalent is a Dell Latitude 7490 which is $600 on eBay.
similar system, brand new on Dell website is $2,000, decked out.

 

[rsutoratosu]

This probably a late reply but curious if you fixed it.. I had about 200 of these in my dept and some of the built were pos.

I had a few were if you hold in in certain position, it would shut off as if it was all dead but it was actually still on.. if i put it down on the desk, everything shows up..

there were few where some of the internal ribbon cables had short or were bad.. curious what else have you tried.

 

[dud]

This probably a late reply but curious if you fixed it.. I had about 200 of these in my dept and some of the built were pos.

I had a few were if you hold in in certain position, it would shut off as if it was all dead but it was actually still on.. if i put it down on the desk, everything shows up..

there were few where some of the internal ribbon cables had short or were bad.. curious what else have you tried.

I investigated the problem and broke down the system to the MB. The interior was pristine. The only thing I found was an overheated surface-mounted component on the MB that had partially melted some of the thin shielding plastic that Dell uses in their laptops to isolate boards/components. I haven't looked into replacing that component.

I've learned a lot from purchasing/owning this laptop. I went with one of the fastest configs available. My unit has an i7, 16 GB RAM and an SSD. It was a very fast machine. Unfortunately, it was also a VERY hot and noisy machine as well. I found that I did not need the speed AND heat/noise so am looking for a replacement with an i5 that runs cooler.

Hope this helps ...

 

[BurnItDwn]

sorry I don't have a solution. But, I am a butthole so i'm gonna say it.

Sounds like a dud, dud.

 

[dud]

sorry I don't have a solution. But, I am a butthole so i'm gonna say it.

Sounds like a dud, dud.

Well Burnitdwn, at least you can admit it ...

 

[BurnItDwn]

You could always play with a multimeter to determine where it may be shorting .... but, it's WAY above my skill level