DELL VOSTRO 2420 - NO POWER GOING IN

[Sintu Y Uyassi]

Hi, my Dell Vostro 2420 is completely dead, with no indication of power going in. The AC adaptor is fine, battery ok but still no power. It came on after a week of going dead but then after powering on for about 7hours, the machine went completely dead after switching it off again & trying to restart.

[rubberman]

Check that the vents are clear. Get some compressed air and blow the system out to help clean it - taking the cover and keyboard off is good so you can blow the motherboard clean. If it is still dead, then you will need to send it in for repair.

[Sintu Y Uyassi]

Thanks Rubberman have done that but still nothing.

Im thinking of dry soldering the power input area of the mother board. What do you think.

[rubberman]

If you know what you are doing, then fine. I wouldn't, but my grandson would. He is much better at that sort of thing than I am as he designs and builds his own PC boards for drone aircraft control systems.

[Sintu Y Uyassi]

Thanks rubberman. Would you mind some advice from your grandson.I would really appreciate it.

Thanks again

[gerbil]

Urg. Could be anything. Dry solder joints are more common than you would like to believe. A tiny trace of corrosion around low power joints, hydrated salts remaining from cheap flux, dodgy connectors, the mb monitor chip, the ps's controller chips. Tap those chips briskly with a pen - they sometimes go "microphonic", meaning an internal pin out connection or silicon junction is intermittent.
I'd check if the PS was receiving a PSGood signal from the mb, and if so, was generating all requisite voltages. And if so, then I would sigh and consign the thing to a bin. Power supplies I can do; I cannot work with components that I can barely see. Others may be able to. There are in use components that are sub-millimetric now... :(. Interestingly, they are more reliable than their larger kin (it's a heat thing), but impossible to work with manually.