How you can diagnose a faulty SIO/EC/IO/Startup shorted chip

[michaelscottcutler]

Excellent video. We want to see the chip being programed. Thanks, Sorin.

[pjzz]

Very useful reminder not to jump to conclusions, but to follow the rail(s) to look for other candidates. Thank you!

[tinkmarshino]

Always love to see your video's in my in box.. you never have a dull video.. something to learn in every one! thanks Sorin..

[davet]

Cheers Sorin. I wish I could say that I had never fallen for the hot component is the problem scenario. The hot component indicates where to look . Before you know it the hot air is in hand and the good component is removed😩.timely reminder, thanks again

[ahsamahi]

Thanks for the video, very useful, damaged chips drawing current more than the rated in most of cases but sometimes it will not it will draw less than rated current

[mm]

Thank you for sharing and looking forward in anticipation for the follow up.

[MrRvdbeek]

Thanks Sorin.
Nice diagnosis the problem

[gtNvidia]

Will be great to see how to programm the super IO!!!!

[zombicreature]

Exactly how it went for me on the x421ia. And weirdly it also takes ~300ma and overheats. Someone tried to unplug the battery from the mobo and ripped the connector from the board that's how it most likely died. I realized that while testing (plugin the power), the safety features of the 3.3V/5V regulator will not always trigger and can lead you the wrong way.

[shesoyam]

Waiting patiently to see how it programs :)

[SingularityRS]

Oh wow, this might be what happened with my old Medion laptop. It no longer turned on. Whenever I plugged the charger in, the "Dual-Channel Synchronous DC-DC Step-Down Controller
with 5V/3.3V LDOs" chip was getting extremely hot. 19V seemed to be up everywhere it was meant to be, but no 3.3V or 5V anywhere. As stated in the video, I made the mistake of assuming the chip was responsible for the fault. I noticed that a cap that's right next to the super IO is connected to ground on both sides. I'm guessing that's not right.

The board is unfortunately not repairable due to my attempts to try and fix it. It is interesting to know what the likely cause of the fault is though. I always wondered what would make that chip get extremely hot whenever a charger was plugged in. This video certainly answered that question.

[gregorymcclure]

I definitely would like to see the super io chip programmed

[revionack]

Stupid question: At first we think it is the first chip because it is hot, but then the output is shorted and this is the super IO chip the problem because it is hot. Could it be that one output of the super IO is shorted as well and make us think that the super IO is dead? To make sure that the super IO is REALLY dead, we could desolder it completely (removing any potential output shortage) and inject 3.3v to see if it is still consuming 200-500mAh, right? Otherwise we are not 100% sure it is dead.

[Klythia]

Sehr gut und realistisch!!! Aber die Firmen möchten das Monopol haben

[HoimaLyrics]

Ohhhh, ever ready to watch your videos

[pirelli]

Waiting for part 2 with the brand new Superior Chip!

[achimugusolomon]

thanks sorin.can you make a video on how to programme an sio/ec/io startup chip?

[gernhardreinholzen]

I dont understand why Sorin thinks there is no bios chip. It has a bios chip (8MB)
- As someone also mentioned. There seems to be a possible cracked cap at 4:19

My guess is he bought Successor (new) or Vertyanov (and not SVOD3/4)

[renbek]

merci beaucoup pour ce cours très instructif

[dwmorris]

Sorin, I had this EXACT issue with my grandson's MSI Prestige 15 gaming laptop. While replacing the LCD panel after it was damaged, I screwed up and shorted the battery connection while trying to unplug it (boneheaded mistake on my part, I know better than to use a flathead screwdriver to leverage a stuck connector when I had a plastic spudger nearby). Sure enough, it killed the laptop. I bought him another laptop and have had this one on the bench as a passion project, LOL. When I powered it up, that same TI LDO regulator showed up on my thermal camera as red hot, and the VREG3 pin showed as shorted to ground. Thinking that was the fault, I removed the LDO, only to realize the VREG3 pad was still shorted -- so it wasn't the chip itself. I'm still poking around looking for shorted MOSFETS and caps, but without a schematic it's really hard to visually trace on this motherboard given the black solder mask and the extremely fine traces. And I don't have a good microscope yet (just a little digital one). This one isn't water damaged and as far as I can tell the SIO is fine, but will be sure to double check it now.

Am also interested in seeing how you reprogram the replacement SIO.