You mean it goes upto 0.44A and then drops to 0.1A or 0.01A?(0.1A-100mA and 0.01A-10mA) Please clarify.
Measure voltage on all coils for the brief time it turns on. may take multiple attempt to measure all coils.
Measure Resistance to GND on all coils without any power source attached.
PS:The bios are seems perfect without any damage.
mcplslg123
Badcaps Legend
Last Activity: 06-12-2025, 11:13 PM
Joined: 06-01-2015
Location: siliguri
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Oops, Powering a board without 3V/5V regulator in place, usually ends up being non repairable.
So Good luck friend.
PS: I simply dont understand why people with no experience in elctronics repair try to repair these device on their own and adding to garbage piles.
I always beleive its better to leave it to experts eg, i dont try to repair my Airconditioner as i dont have any expertise in that field.Leave a comment:
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No, sections are different for internal Screen and HDMI. In your case, very likely HDMi will work flawless.
However, dont jump to the conclusion that APU is bad. I figured that after lots of investigation.
Check whether all inputs of internal screen are stable or not like BL_ON/INVT_PWM/LEDVDD etc.
The names may differ in your schematics....Leave a comment:
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Since CMSRC is missing,ACDRV has to be low only. ACDRV goes high only when you have ACDET/ACOK and CMSRC present.
How you checked the DC-IN mosfets? Please share the readings in resistance mode between
01.Drain-Source
02.Drain -gate
03.Source-GateLeave a comment:
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I request all members not to indulge in personal comments.We all are here to help fellow members and not to promote ourselves.
Ofcourse, the suggestions given are free and sometimes we'll err on comments.So should'nt be a big fuss.
I've my own PAID channels where i teach my students online and i dont even refer it here. I earn more as trainer then by repairing.Leave a comment:
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Not necessarily LCD power related. It could be even PCH part of SOC.
Recently had a HP LA-G07XX mb with 8th gen i5 SOC and it starts flicering when brightness exceed 70%.
Tried everything but in vain and finally decided to replace SOC . Problem was solved.
ON newer SOC boards,screen flickering is more often then not a fault of PCH.Leave a comment:
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m1ch43lzm[USER="274144"]m1ch43lzm[/USER] Sorry for goof up.I didnt bother to see schematics...Leave a comment:
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Which programmer you used? If old bios was working and backed up properly,then i dont see any reason for it not to boot with same bios flashed again.
may be some resistor around bios chip misplaced?
A pic of the bios area will perhaps help.
In the meantime,post a request in "Bios Section" for new cleaan me bios while posting your original bios backup.Leave a comment:
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Those coils with 0.4 Ohms seems suspect but that depends on the circuit its intended for. can you write the name of the controller there. It does seems like screen related controller.Leave a comment:
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U mean you connect charger first and then battery and it charges fine? And if battery is put first and then charger,it dont charge? Right?
If so, fault lies in dc-in mosfets and/or discharge mosfet.Leave a comment:
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English please. Dont understand the language but i guess you've trouble programming IT8987VG on Asus FX506.
This SIO will be automatically programmed on 1st boot as long as its new and blank.
It cant be programmed from kbd connector with any kbc programmer. KBD connector will only detect the KBD controller(56KB)-so dont try to program it.
The SIO can be programmed thru JTAG but have not tried myself on this model so far.Leave a comment:
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Look for corroded caps near backlit controller. If corroded,replace those caps. Last thing to try is replacing the backlit controller.
Btw, if u have spare tested battery,test it first with another one.Leave a comment:
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The fan keeps spinning even after shutdown points to PCI_Wake being not de asserted on shutdown.
The possible fault could be
01.Wifi card
02.Ethernet Controller
03.card Reader
04.Sound card
05.Dc-dc converter for 3.3V/5V/1.8V etc.Leave a comment:
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What's the point of measuring Resistance to GND on D+/D-(data lines) when pen drive is working?
Since USB3.0 is working and USB2.0 is not working, it has something to do with usb2.0 circuit.Leave a comment:
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Another thing to look for is PROCHOT#Leave a comment:
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Replacing the Ram Slot wont solve it for sure as long as there is no loose pins.
Till date, i've not across any lenovo's with ram slot pin issue.however, this is very common fault on newer HP motherboards.
Going by the LED indication of ram slot tester, its cracked ball under CPU 'coz of low melting solder used by lenovo(very common issue with Lenovo's)
So reballing/replacing the SOC is perhaps the only option to fix it and that require a great deal of skill besides tools.
Btw, what's the mb code?Leave a comment:
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Which ram it uses-DDR3/4? is the ram onboard or its in slot?
I dont see ram voltage in your list.
If its DDR3-should be 1.5V.Similarly for DDR3-L-should be 1.35V and for DDR4 should be 1.2V.
Confirm its present there or not.
Once checked, proceed to check DDR_RAMRST# is present or not.Leave a comment:
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25Q80 chip(1MB) is thunderbolt firmware.Leave a comment:
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The circled caps are not likely shorted . They are part of cpu vcore circuit and low resistance to gnd is expected there.
Without boardview, its not possible to dig deeper-so yeh tough to crack it.Leave a comment:
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