Identify Power Management chip DELL E7240 (LA-9431P)
Hello,
I have a problem on a DELL E7240, LA-9431P motherboard (rev 1.0).
This is a laptop that I recovered, it had liquid dammage and had corrupted bios.
I reprogrammed bios + ec (v A.29 ME Clear)
I cleaned everything, after reassembly, it boots and it smells like burnt after a few seconds ... I disassembly the motherboard and see that the Power Management chip (in attached photo) has burnt!
It's the P800 chip on the schematic repair, and suddenly I can no longer read the info on the chip, if someone can direct me to avoid having to buy a used motherboard and and put a new one used and find a new one ?
The "470" resistor is indeed 47ohms and no short circuit around the chip ... Where can the problem come from? I lean for the battery which died following the damage of the spilled liquid? ... or not ...
Other points if one can enlighten me:
- I have the message in the post on the power supply not recognized while it is indeed an original DELL 65W charger (like the original one) with a constant voltage ... When I put the CMOS battery back and switch the message (F3) I don't have it afterwards but I shouldn't get this message if the charger is good? Problem due to the chip?
- Despite that this chip is dead, the pc boot load the bios and windows but I find it very very slow (i5 4310U - 8go - SSD mSata) !!! ?
--> i've seen the i5 lock to 800Mhz and 0.665V--> so i think it's Power management chip problem ?
Thank you in advance to those who will look into my problem, thank you
I have a problem on a DELL E7240, LA-9431P motherboard (rev 1.0).
This is a laptop that I recovered, it had liquid dammage and had corrupted bios.
I reprogrammed bios + ec (v A.29 ME Clear)
I cleaned everything, after reassembly, it boots and it smells like burnt after a few seconds ... I disassembly the motherboard and see that the Power Management chip (in attached photo) has burnt!
It's the P800 chip on the schematic repair, and suddenly I can no longer read the info on the chip, if someone can direct me to avoid having to buy a used motherboard and and put a new one used and find a new one ?
The "470" resistor is indeed 47ohms and no short circuit around the chip ... Where can the problem come from? I lean for the battery which died following the damage of the spilled liquid? ... or not ...
Other points if one can enlighten me:
- I have the message in the post on the power supply not recognized while it is indeed an original DELL 65W charger (like the original one) with a constant voltage ... When I put the CMOS battery back and switch the message (F3) I don't have it afterwards but I shouldn't get this message if the charger is good? Problem due to the chip?
- Despite that this chip is dead, the pc boot load the bios and windows but I find it very very slow (i5 4310U - 8go - SSD mSata) !!! ?
--> i've seen the i5 lock to 800Mhz and 0.665V--> so i think it's Power management chip problem ?
Thank you in advance to those who will look into my problem, thank you
Attached Files
!!!
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