Yeh,flash the bios chip first and then if issue persists we can dig further. However,i'm very hopeful it will be resolved with bios flash.
PS: I wont be available for next 4-5 days as heading for a short vacation but keep the forum posted about progress,if any.
Good luck.
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The chip with 128 or 256 is the main bios . Not advisable to flash with a clamp. Instead order a socket and desolder the bios chip and put in socket and then proceed to flash. You can upload your existing bios in dedicated "BIOS SECTION" and ask for a clean me bios.
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Not faced yet,so honestly speaking no idea. Any update on manufacturer's website?
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Resistance to GND as low as 0.1 Ohms is very very likely fine on gaming laptop's GPU.
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medinfo[USER="180570"]medinfo[/USER], do you still need mon2"s confirmation to conclude that EC is shorted?
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Remove the chip PU3 and then measure resistance to GND again on coil PL20/23. Next measure resistance to GND on pin8/17/16 of PU3(pcb pads).
PS:[COLOR=#c0392b]DONT PUT POWER WHILE PU3 IS NOT SOLDERED.[/COLOR]Remove the chip PU3 and then measure resistance to GND again on coil PL20/23. Next measure resistance to GND on pin8/17/16 of PU3(pcb pads).
PS:[COLOR=#c0392b]DONT PUT POWER WHILE PU3 IS NOT SOLDERED.[/COLOR]
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The resistance reading is for consumer side with jumper PJ402 open? Right? If so,there is no short on 3V line.
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First, you need to remove the EC and PD102 and check resistance to GND on CLR/3V LDO/ 3V Coil. If everything is ok, proceed to replace these two parts. Yes IT8227E is programmable and there are few sites which offers this chip pre programmed. However, there is afair chance that EC will program itself on first boot if you flash clean me new main bios.
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You forgot to mention pin12,PU5 voltage. PU5 seems powered and getting the enables as well.So Timer ON(TON) pin very important for it to give output.Check PR34 is 600K-often this resistor go bad. If PR34 is ok,replace PU5.
You've not shared PU13,pin15 ststaus aslo.
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PJ402, consumer side resistance to GND? I feel replacing the chip may not fix it as there seems partial short on consumer side of PJ402.
Powergood wont rise as long as the jumper is open-so irrevalent finding.
injecting 3.3V and drwaing 300mA is itself indicative of partial short. Keep it injected for 10-15 mins and pay special attention to KBC chip and PCH if you dont have a thermal camera.
Btw,how much amps you injected?
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As per post#8 pic,the burned mosfet are clearly AON7403. Its a P channel mosfet.
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Always link the schematic/bdv for faster response.
Share voltage on all coils after powering on.
Ram is onboard or slot is used?
Consumption on dc supply varies while powering on?...
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Share resistance to GND on coil PL16/PL30
Mainon present?
Voltage on pin10/11/12/13/15 of PU5 after pressing power button?
PU13,pin15 voltage?
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