Hi to all!
I have 2 x Motherboards M4800 (1x is LA-9771P which is LVDS cable, and 1x LA - 9772P eDP Cable)
LA - 9771P came, faulty with damaged keyboard port, broken USB etc. almost bend in half , but you could hear the fan spin and lights go on.
LA - 9772P ,bought it from eBay as used some months back, worked like a charm , prime95 and dell diagnostic for hours to see if it's good ,just in case.All went well, so i stored it in the bookself ,until i got the new plastics that i wanted from China.
Yesterday, all came, so i began to assembly , but no reason the LA-9772P, board suddenly didn't post anything ,not even lights, nothing. I removed everything from it, just in case something was making a problem ,but again nothing, only the board + CPU and power button ,but again it's dead.
I made, CMOS, RAM Swap, even Clean BIOS ME from SMDFlea which i found from the forum , even got the BIOS from the LA-9771P and tried just in case nothing.
So i began reading around , and saw the MOSFETs close to the "Power jack" measured and i saw some funny results, so i got the MOSFETS (from the 9771P ) and plugged them into the 9772P ,again nothing not even light .Returned them ,to the 9771P and the 9771P spins.
So, the situation is really frustrated to my knowledge .
The schematics show that the PQ5 / PQ701 ,both are "SI7149DP",but on the chip it self (under the microscope ) i see "MDU6303".
What can result to the sudden death ?It's really strange.
I have 2 x Motherboards M4800 (1x is LA-9771P which is LVDS cable, and 1x LA - 9772P eDP Cable)
LA - 9771P came, faulty with damaged keyboard port, broken USB etc. almost bend in half , but you could hear the fan spin and lights go on.
LA - 9772P ,bought it from eBay as used some months back, worked like a charm , prime95 and dell diagnostic for hours to see if it's good ,just in case.All went well, so i stored it in the bookself ,until i got the new plastics that i wanted from China.
Yesterday, all came, so i began to assembly , but no reason the LA-9772P, board suddenly didn't post anything ,not even lights, nothing. I removed everything from it, just in case something was making a problem ,but again nothing, only the board + CPU and power button ,but again it's dead.
I made, CMOS, RAM Swap, even Clean BIOS ME from SMDFlea which i found from the forum , even got the BIOS from the LA-9771P and tried just in case nothing.
So i began reading around , and saw the MOSFETs close to the "Power jack" measured and i saw some funny results, so i got the MOSFETS (from the 9771P ) and plugged them into the 9772P ,again nothing not even light .Returned them ,to the 9771P and the 9771P spins.
So, the situation is really frustrated to my knowledge .
The schematics show that the PQ5 / PQ701 ,both are "SI7149DP",but on the chip it self (under the microscope ) i see "MDU6303".
What can result to the sudden death ?It's really strange.
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