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DDR slots tested with the same result. Did several tries, and sometimes L7201/21/41 get 1.08v (that should be ok), restarts if self and get 1.28, then powers off. Next manual switch on, starts at 1.28, restarts in 2 seconds and gets 1,53v, then powers off, switch on manually and reads 0.8v...

Tested with a functional CPU, still same. I started the board without CPU and there is 1.28v at the L7201/21/41 Seems that something shorts them with the CPU inside... Could inject that voltage to find any heating element, if there is any other, apart the cpu. What do you think?

P33-> 3,37v P36->0,05v

P19-> 5,056v P32-> 1,085v

L7201/21/41 0,01v ALL_SYS_PWRGD 3.38v PCIE_RESET_L 0v The MXM card is a working one.

Just replaced the U7401, now the second light powers up, mounted the system, but powers, fan speeds up and power down again. No post error sounds, no "dong" sound and no screen powering up.

Just only find a too high diode value at pin 13 of the U7401, 2,056

L7460 to ground-> 5,5 Ohms

U7401 14 -> 12,08 16 -> 5,09 22 -> 5,07 29 -> 3,33

L7320->5,08 L7460->0,01* L7610->1,21 L7660->3,37 L7920->1,11 Seems that there is a problem at the L7460, likely u7401 related? what to check there? Many thanks for all your help and guidance

Hello, unsolded from a donor a D7301, values where different on diode, so changed it first Results: P1->3,36 P2->4,55 P3->1,078 P4->0,801 P5->5,09 P6->5,09 P7->5,09 P8->GND P9->2,89 P10->5,09 P11->12,08 P12->9,98 P13->7,09 P14->5,09 P15->5,09 P16->1,25 But still not working led 2 of the board.

Yes, I have the 5VREG_EN at 3.36v L7320 -> 0.108 U7300 v diode P1 -> 3,36---- 0,568 P2 -> 4,55---- 0,728 P3 -> 2,66---- 0,726 P4 -> 0 ------ 0,721 P5 -> 0 ------ 0,112 P6 -> 0 ------ 0,827 P7 -> 5,089-- 0,582 P8 -> gnd ---...

Do you know a easy way to check for a problem there?

The U7300 gets some hot when powered, around 38C quickly, and also the U1400, if the 7300 was bad, should not heat up? not?

Two lots of 2 units from different sellers, latest ones came in bga sealed packets, tested all four with same results, just because of this I said this make me crazy. Any other thing to check?

New ones

Hello, unsoldered the Q7330 and the Q7335, both seems good on readings and gate enabling compared with new ones. The C7326 reads 102,5nf (0.1uF) seems OK

Hello, will work around, soldered a new one again, and same. L7320 -> 0.118 R7301-> 99.9K R7302-> 24.89K R7304-> 0 R7305-> 7.70K ?? (43.2k) R7306-> 6.8K ?? (8.06k) R7310-> 9.92K R7311-> 101.1K R7312-> 38K ?? (100k) Should any of the ?? ones to be desoldered to check out the board? The...

Same result, still no luck

C7306 pin1-> 2.15v pin2-> 0v 1.1nF seems OK D7301 Pin1-> 5.15v pin2-> 6.74v, at diode mode 0.160v and 0v Will try again to solder the chip, I preheat the board a little to make easy the solder