DeXXter
Senior Member
Last Activity: Today, 10:01 AM
Joined: 08-08-2023
Location: Santiago
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Did u check the first mosfets? A failure there can trigger charging issues too. Is your ec fine? no water there? -
Yeah you clearly haven't tested that, I've replaced all kind of mosfets, ecs, some pch (crap around connectors) and haven't got a single plastic melted around on the board while using copper tape, even use it to protect electrolytic capacitors on gpus. For me it works better than aluminum, kapton and even PTFE (tested all of those)....Leave a comment:
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The copper acts as shield for the hot air, most of the plastics used on motherboards can handle high temperatures, but not the direct air. Besides it's no like you will put the nozzle directly on the covered plastic right?...Leave a comment:
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Desolder it
Also get copper tape to protect plastics and other components, this is way better than kapton and aluminum tape.Leave a comment:
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I got nothing, only 5v (and the ldos) the mosfet was not directly connected to that line (that rail had a double n channer mosfet), this mosfet was a link between that double mosfet and the id pin of the battery, it was very tricky, I spent days trying to figure this thing out.
Yeah I saw it's a very expensive, first you should get a ch341, and reprogram the bios....Leave a comment:
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First you have to program the bios using a programmer desoldering the bios (ask for a clean bios here on badcaps), if you still have the same issue you can just buy a blank ec, is like 5usd. So maybe it will program itself.In these cases this is the only way.
Making that probe should help, but it looks like you don't have anything on your bios so most probably you'll get no blinking, because for some reason is just not turning on (your multimeter should show some current). I had an acer like your laptop, and the issue was a channel n mosfet on the ec_rst rail (close to the battery in my...Leave a comment:
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If you end up needing a programmed ec, send me a dm, I got a good chinese store that sells programmed ec on request (also stuff like cpus and other ics)....Leave a comment:
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The 33k end resistor works as your "probe". You can use a cmos battery as the power supply (+ and -). I made one with a 3.3v ldo ic and used a 5v cable from my phone to power on the thing, that before I got a cheap zoyi oscilloscope.
Now you might need to reprogram your bios before going further, desoldering from the board btw, but using a proper programmer, like the ch341, I've used this cheap programmer in many cases. If you don't get your laptop fixed you might have an issue on the ec and well that's another story....Leave a comment:
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How did you reprogrammed your bios? sometimes the ch341 isn't that realiable tbh.
I guess you don't have an oscilloscope, so I would recommend you to build a logical tip, you can make one with two transistor a led and some resistors (i2coffe), this will blink when the bios is communicating (you can measure pin 1 or 2) if it's communicating, even if it's corrupted it should....Leave a comment:
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Is fine then, as I said look on google for msi pulse schematic and boardview (I can't upload it now), that one has a 11th intel cpu, in the end of the schematic you'll find the power on sequence, with that you can check where are you standing.
*I don't know which multimeter do you have, but is always better to solder needles on the on the tips, that way you can measure small components, otherwise you might end up shorting something, for example to measure the EC you'll need those.
*Be careful, your laptop might have a bios issue, but if not, then is one of those really...Leave a comment:
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That thing with dc jack was smart, if you don't have that specific schematic use a different one, I will leave you one from a different gf63, not the same cpu, but it might help you. Also find the schematic for the MSI pulse, this has the same 11th cpu, so the power on sequence should be the same.
Now check if you have the 3.3v on the power button and if this is going to ground when pressing it....Leave a comment:
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Thanks a lot guys!Leave a comment:
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That motherboard is a nightmare, I had to replace around the 10 components and was still shorting stuff... Now your board was working before you use that patch script? What was the original issue?Leave a comment:
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Update: Got a programmed ec from aliexpress, the laptop now turns on, have to make a little pressure on cpu tho (solder ball original issue, ec was shorted by the last repair shop).
So for legions you need a programmed EC, it won't program itself
This is how it looks now
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Thanks for the information. I'll see what I can do....Leave a comment:
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Yeah there are connection between the ec and the main bios through spi rails, now i just checked a random bios from a legion uploaded here on badcaps and a ec dump (posted here too) using HxD and the main bios contains the ec programming, what I don't know about is that you said it needs a bootloader, I was planning on buying just a "new" ec. I guess it should be blank I usually buy from that store on China and they send me good ics....Leave a comment:
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Lenovo Legion 5 EC question
Hello guys, do you know if this EC IT8227E-256 need programming? I checked another post where some guys said that the IT8227E-256 can program itself from the bios using a blank ec, but i'm not sure, does anybody know for sure? I don't have an ec programmer so I want to know if I need to buy it programmed or I can buy it blank, it takes a month to arrive to my country from China, so don't want to wait that much twice.
EC had a little explosion and got the 3v LDO shorted btw.
Thanks
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I guess from asus site [url]https://rog.asus.com/desktops/mid-tower/rog-strix-ga15-series/helpdesk_bios/[/url]
Btw that uefitool thing that I said is for intel motherboards, I didn't see that yours is an amd, so my bad, I haven't programmed one of these, but I guess you can just download it and program it, in any case save a backup from the original, and do it twice, with different softwares, asprogrammer and neoprogrammer for example (I use these with the ch341).https://I guess from asus site [url]...br /> Btw that...Leave a comment:
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Nice, I got a lenovo legion 5 with a blown up EC it8227e-256 and I will get a blank one, I hope it will program itself (I don't have a programmer)....Leave a comment:
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Alright, try to check a video about programming one of those bios, the few times I've done that on asus desktop motherboard I had to use uefitool to extract the bios body (something like that) before flashing the ic.Leave a comment:
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