Ok , so i received this motherboard to fix , and found a few issues on it , it was with a shorted mosfet attached to one of does 51117 TPS , sincerely its a shit board since nothing is identified , but for my experience this is for lower voltage , rams or gpu or MCP in this case.
SO replaced mosfet , and machine turn on , get heat on the mcp and Vcore for ir , but 0 volts for CPUcore .
SO replaced this 51117 on that line , seems some values were not beeing sent from it , (for what i can see on schematic , so after replacing it , i notice the Vrams get hot when i turn it on , (when turning it on previously green light stay on , but no vcore . ) now led shut down after few secod , but still having Vcore on cpu 1.09 volts , and cpu still hot , but also the 4 nvram stay hot .(bottom of the RAM socket) (the guy who gave me this mentioned this was happening and now image ... so beeing around this board by intuition is a bit lamme and critical , since we must travel around Tpoint (only ID i got to be more near of wich part of the schematic im testing. if anyone had this issue before on the same or simillar machine , share some info .
thk in advance
BTW the coil of that TPS 51117 for the VRams , one side on S5 gives me 1.54 volts but the outher side gives me 1.77 volts ( i assume is gettig hot the nvrams due to this , will replace this coil just in case ..
SO replaced mosfet , and machine turn on , get heat on the mcp and Vcore for ir , but 0 volts for CPUcore .
SO replaced this 51117 on that line , seems some values were not beeing sent from it , (for what i can see on schematic , so after replacing it , i notice the Vrams get hot when i turn it on , (when turning it on previously green light stay on , but no vcore . ) now led shut down after few secod , but still having Vcore on cpu 1.09 volts , and cpu still hot , but also the 4 nvram stay hot .(bottom of the RAM socket) (the guy who gave me this mentioned this was happening and now image ... so beeing around this board by intuition is a bit lamme and critical , since we must travel around Tpoint (only ID i got to be more near of wich part of the schematic im testing. if anyone had this issue before on the same or simillar machine , share some info .
thk in advance
BTW the coil of that TPS 51117 for the VRams , one side on S5 gives me 1.54 volts but the outher side gives me 1.77 volts ( i assume is gettig hot the nvrams due to this , will replace this coil just in case ..
Comment