Hello friends,
I have lenovo g50 mobo nm-a272 , that is behaving weirdly.
After power on this happens:
[URL]https://youtube.com/shorts/tBUo6eokvHQ?si=6bTbbz8rvLA8HGgY[/URL]
Board had replaced superio chip, that was preprogrammed and tested in identical board, also bios was done the same way.
Board does have stable 5v and 3.3v, but nothing on cpu mosfet and logically nothing on ram mosfet.
Does the same thing with or without memory.
Any ideas?https://Hello friends,<br />
<br />
...nm-a272 , that
Thank you to the guys at HEGE supporting Badcaps [ HEGE ] [ HEGE DEX Chart ]
Announcement
Collapse
No announcement yet.
User Profile
Collapse
-
Re: Asus ROG N501JW - dead
Hi guys, i have two boards n501jw identical, both have it8585vg chip dead. After replacing, i get white light on power led and red light on keyboard but that's it. It stays black, and turn immediately on after powering off.
I have nice and healthy 5 and 3.3, aslo ~1.4v on RAM, but nothing on cpu and gpu coils and only about 2v on battery output. Also no charging light even after connecting the batt.
Any ideas? Dead bios?
-
Re: Lenovo ideapad 520 power on issue
issue with fan solved by.... replacing the fan...
Leave a comment:
-
Re: Lenovo ideapad 520 power on issue
a year later, i still have laptop, but it developed another symptom. Fan runs at full speed all the time, once cpu get's over 50°C and no matter how hot or cold it runs, fan goes full blast all the time. It's fine while gaming but it's annoying when watching movies or working.
Board is almost identical to one in ideapad 330 , so if anyone had any idea what can be an issue, please let me know.
Leave a comment:
-
Re: Lenovo ideapad 520 power on issue
SOLUTION FOUND: REPLACE KBC - fits from ideapad 330 without issue or get programmed one from ebay/aliexpress. laptop works flawlessly now
Leave a comment:
-
Re: Lenovo ideapad 520 power on issue
Guys, any ideas what could this be? thanks a lot
Leave a comment:
-
Re: Lenovo ideapad 520 power on issue
yes, 10.3kOhm , anyway, i'll look up one on my spare boards.
I don't think it is the issue that's causing the board not to work when battery or cmos battery is connected in.
Also I have observed this:
[url]https://www.youtube.com/watch?v=cySZEq9O0B4[/url]
it works as long as i hold the power button.Re: Lenovo ideapad 520 power on issu...sing the board
Leave a comment:
-
Re: Lenovo ideapad 520 power on issue
pr103 removed, says 10.3 now
Leave a comment:
-
Re: Lenovo ideapad 520 power on issue
diode seems ok
multimeter set to 20k ohm ,
pr102 says 1.5
pr103 says 5.5
Leave a comment:
-
Re: Lenovo ideapad 520 power on issue
if battery and cmos battery is disconnected, it turns on from adapter and runs fine , boots into windows and install drivers - dies once it installs nvidia driver, if i disable it in bios before letting it to boot, it will work normally.
also fan is running at max speed for some reason.
Leave a comment:
-
Re: Lenovo ideapad 520 power on issue
and without AC only on battery voltages are:
pin 1-3 - 8.29v cca [0.02 change over pins]
pin 5 - 8.28vv
altought
pin 4 says 14.2v
Leave a comment:
-
Re: Lenovo ideapad 520 power on issue
voltages are
without battery:
pin 1 - 0.84v
pin 2 - 0.83v
pin 3 - 0.84v
with battery:
pin 1 - 8.59v
pin 2 - 8.59v
pin 3 - 8.59v
pin 5 - 20.3v
Leave a comment:
-
Re: Lenovo ideapad 520 power on issue
another thing i found out is that if i hold power button it turns on from battery, shows lenovo logo, keyboard lights up and then it turns off. if i hold it a bit longer it actually starts to boot but once i release the key it shuts down in next 3 seconds
also can you post the schematics please?? is there a boardview too ?
Leave a comment:
-
Re: Lenovo ideapad 520 power on issue
ok, so i decided to buy it anyway, still can use it for parts.
motherboard is nm-b452
and here are videos of what it is doing and I also did some measurements of voltages
also I just found out that once it get's geforce drivers installed it shuts down immediately
[url]https://www.youtube.com/watch?v=uqvXLSAhMag[/url]
[url]https://www.youtube.com/watch?v=6NMDSBNpgqw[/url]
[url]https://www.youtube.com/watch?v=XoqalO3EsPE[/url]Re: Lenovo ideapad 520 power on issue
...
Leave a comment:
-
Lenovo ideapad 520 power on issue
Hello once again guys,
I am thinking about buying Lenovo ideapad 520 for fix, that have power on issue. I don't have that laptop in my hands now so I can't really tell what model of mainboard is in it. Anyway...
Thing is it powers on only after cmos and main batteries are disconnected for a while. If one of batteries is left connected, it will not turn on at all or turn on but stay on black screen.
I have seen this issue before on different models of ideapad and newer found a solution to it so I decided to ask here, maybe someone knows what's wrong.
...
-
Re: da0zrtmb6d0 charging issue
absolutely nothing. i just pressed and held down the SW3 button twice and it started to work normally. also it looks like battery is on it's last leg. so i recommend getting known good battery to avoid having this issue while fixing the rest
Leave a comment:
-
Re: da0zrtmb6d0 charging issue
thanks , charging issue solved.
now, any ideas about that gpu? Or should i try to gently reflow it?
Leave a comment:
-
da0zrtmb6d0 charging issue
Hello guys,
i got my hands on motherboard da0zrtmb6d0 rev D , that is used inside Acer E5-573g .
Board works fine except two things:
First issue is that it does not charge and does not see battery under windows. charging light keeps flashing orange, but battery holds charge, laptop runs from it and also charges which is kinda weird. Thing is, it keeps flashing even when I plug the battery in and don't plug in charger.
See attached video: [url]https://www.youtube.com/watch?v=HbJQUx4f5RM[/url]
So far we replaced KBC chip...
-
Asus F556U
Hello guys, I just got my hands on Asus F556U (x556uv motherboard), that does one weird thing. On first start it does show asus logo, starts booting and then reboots, then it shows boot logo again and after a while it crashes with blue screen that says "WHEA UNCORRECTABLE ERROR". Also it does not boot into linux.
I got it from guy who brought it to larger repair store, that told him there is probably an issue with RTC or DMA.
Any ideas where to look or what to fix?
I tried to gently reheat the ITE chip and it seemed to work for about a 2-3...
-
P5we0 la-6901p
Hello, we are currently battling motherboard P5WE0 LA-6901P rev 2.0 , that turns on, cpu/gpu warms up normally, we have 3V and 5V , also 1V for CPU and 1V for GPU, but nothing on screen, power led stays off . only led that works is battery charging led.
any ideas?
Thanks.
No activity results to display
Show More
Leave a comment: