khj
Member
Last Activity: 11-10-2024, 04:01 AM
Joined: 06-12-2023
Location: seoul
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yes I used display that working on normal board. in diode mode, them looks like 0.5... -
a2338 no backlight (i2c_bklt_sda, i2c_bklt_scl no signal)
Hello.
I have a problem about backlight.
I changed almost backlight parts, but I can't get over 40v from them.
I think display connect signal is missing. (I2C_BKLT_SDA, I2C_BKLT_SCL is just pull-up voltage (5.18V) when I connected edp )
so backlight circuit doesn't step-up voltage.
normal logic board has I2C signal. but bad one is missing.
what should I do?...Last edited by khj; 01-24-2024, 02:33 AM. -
a2337 PP5V_S2 missing no short.
I have a a2337 m1 MacBook Air that has no power.
PP5V_BSTLQ_SPMU is shorted so I fix it by change cap, coil, u7700. now normal voltage.
when I didn't connect battery , plugged in power, there is only 5V 0.25a.
so I checked every power rails , I finally founded PP5v_s2 is 0v, but there is no short.
PPBUS_5VS2_VIN = 12V normal
P5VS2_EN from U8100 = 0.6V maybe normal
P5VS2_FB,PGOOD,VC,SS,BIAS,INTVCC = very low voltage maybe abnormal.
what should I do ?? do I need to change uc300?Last edited by khj; 12-06-2023, 07:05 AM. -
ipad pro 4th 12.9 A2229 board view please.
Anyone who has A2229 board view?
my ipad is dead. -
ipad pro 4th 12.9 no power after wet
My ipad pro 4th 12.9 is no power after wet.
What is mainstream problem?
I input power using my power supply but it looks 0A.
I think there is some short so it cant charging and turning on.
But i cant find shorted cap. They show 3.5V. What should i do in this case.
There is who has board view? -
Re: Ipad pro 4th 12.9 missing parts. HELP
i think wifi is no chip.Leave a comment:
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Ipad pro 4th 12.9 missing parts. HELP
There is anyone who know this missing parts?
I cant find what it is... -
Re: ipad air 4th doesnt working touch
I changed lcd + touchscreenLeave a comment:
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ipad air 4th doesnt working touch
Hi guys.
My ipad air 4th doesnt working touch.
I replaced display but cant fix it. I think the reason is mainboard.
I can hear some noise sound at this parts (i upload the picture)
It is shield so i cant check now.
What is the reason? Bad cap is the reason that touch is not working?... -
Re: ASUS zenbook um425 spinning fan only, no power
i fixed battery. and i checked charging is no problem.
but why only spinning the fan?Leave a comment:
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Re: asus zenbook um425ia(ux425) NB2555 pcb
I fixed my battery. I charge it with my powersurply.Leave a comment:
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ASUS zenbook um425 spinning fan only, no power
i bought it that has a problem that a previous user said it can't turn on after bios update.
i checked it. If i plug in the power, it just spinning fan. power button didn't work. and then plugged out it, a few seconds later, stop to spin.
so i detatched rom chip and dump it bios file that get this site.
sadly, same problem.
But now, if i plug out the power, stop to spin immediately. so i checked battery voltage. it was 0V (15.48v is original volt, i think, there was some problem last night). and if i plug in power, charging volt is 12.25v... -
asus zenbook um425ia(ux425) NB2555 pcb
please help me.
i need asus UM425 schematic.
i bought it that has a problem that a previous user said it can't turn on after bios update.
i checked it. If i plug in the power, it just spinning fan. power button didn't work. and then plugged out it, a few seconds later, stop to spin.
so i detatched rom chip and dump it bios file that get this site.
sadly, same problem.
But now, if i plug out the power, stop to spin immediately. so i checked battery voltage. it was 0V (15.48v is original volt, i think, there... -
Re: New Members - please post your introductions here
hello guys. i want to know biosLeave a comment:
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