Dell E6430 shortcircuit

[Andreasbest]

Re: Dell E6430 shortcircuit

Dell is a bit weird. Remove the CMOS battery, plug in the charger wait 1 second, remove the charger then quickly plug it in again. It should cycle 2-3 times then turn on.

Is the speaker connected? If not, connect it before turning ON. Report back if it beeps when you turn on and how many beeps.

Hello.
I did it but same behavior occurs, probably something else is broken too.
I reprogram both bios chips but no luck.
What do you think?

[Spider1211]

Re: Dell E6430 shortcircuit

Where was the shorted cap? Does it have any reference that we can use to locate it in schematic? If not, provide a picture.

Previously you removed the CPU, it could be that dust got on the contacts. Remove the CPU and give it a good blow with compressed air. Also check if there is no broken/bent pins on the CPU itself.

Sometimes motherboards are picky and wont post without a good CMOS battery. Check yours if present or put a known good one and try again.

As for your BIOS, try cleaning the ME region. If you don't know how, post your original dump in the BIOS section and someone will help you.

[Andreasbest]

Re: Dell E6430 shortcircuit

The cap is in bottom of the motherboard (check marked area in attachment)
I think the cap is 0.01uF, not sure though.
I tried another CPU, no luck.
I tried 2 bios upload in forum and are guaranteed working but i was not lucky either in this case.

What do you think about the cap?

[Spider1211]

Re: Dell E6430 shortcircuit

Measure voltage on all the coils and report back. Check if the power button is triggering properly by measuring voltage on it. It should be 3.3V unpressed, goes to 0V when pressed then back to 3.3V when released.

[Andreasbest]

Re: Dell E6430 shortcircuit

Just noticed the PL301 is broken and missing from MB.
Perhaps that's the problem or not critical component?

[Spider1211]

Re: Dell E6430 shortcircuit

What do you mean by broken? Physically or bad solder? Is there any voltage coming out?

[Andreasbest]

Re: Dell E6430 shortcircuit

Physically broken, no idea how and when.
No voltage on either pins.
Switch has 3V and 0v when i pressed it but the MB remains on.
What a mess.

[Spider1211]

Re: Dell E6430 shortcircuit

Replace it if its broken and check again. Voltage present and stable on other coils?

[Andreasbest]

Re: Dell E6430 shortcircuit

Which ones you want to measure?

[Spider1211]

Re: Dell E6430 shortcircuit

All of them but deal with the broken PL301 first. Check if PU300 is being told to turn on also, measure voltage on pin 5.

[Andreasbest]

Re: Dell E6430 shortcircuit

PU300 has 3.3v on pin 5.
I'll replace the broken PL301 with one from the donor mb.

[Spider1211]

Re: Dell E6430 shortcircuit

OK great, hopefully PL301 is the only issue.

[Andreasbest]

Re: Dell E6430 shortcircuit

Yes with PL301 the switch worked properly again, switch on and off.
I'll try it with screen to make sure everything works good and report back.

[Andreasbest]

Re: Dell E6430 shortcircuit

All work, thank you very much mate!
If you ever come to Greece the beers are on me )

[Spider1211]

Re: Dell E6430 shortcircuit

Congrats! That feeling never gets old

[ravi_1617]

Re: Dell E6430 shortcircuit

Hello!
I received one E6430 that has a shortcircuit, when i plug the charger in it, the charger turns off. Must unplug and plug from mains to make charger work again.
Any ideas???
Thank you in advance!!

I too had same problem, main line short ,
Found capacitor was short,
After that board turned on and took long time for Dell logo to come. And didn't boot windows
While testing ,it down again
now no more display at all and board turns Off ,
Stays on only 10 seconds.
All colis have power fine ,CPU & PCH heating normal.
What is causing problems.
Thank s in advance

[Spider1211]

Re: Dell E6430 shortcircuit

After that board turned on and took long time for Dell logo to come.

Likely to be a BIOS issue. Try to clean ME of your Bios, or try a known good bios dump.

[Andreasbest]

Re: Dell E6430 shortcircuit

I too had same problem, main line short ,
Found capacitor was short,
After that board turned on and took long time for Dell logo to come. And didn't boot windows
While testing ,it down again
now no more display at all and board turns Off ,
Stays on only 10 seconds.
All colis have power fine ,CPU & PCH heating normal.
What is causing problems.
Thank s in advance

Hello!
It looks indeed like BIOS error, download CLEAN ME bios and flash it. Worked for me.