Dell SE198WFPf - No standby
No standby light and no power.
Wish I had a schematic for this board as I'm sure it would make things a lot easier.
I have replaced the caps on both the power and mainboard but no change.
Voltages on cable coming off of the power board read as follows (plugged in, no power):
1) 5.03V
2) 5.03V
3) -1mV (milli)
4) -1mV
5) 139.5mV
6) 2.355V
7) -9.6mV
8) 0.65V
There are no markings as far as what pins are what. Pressing power button does not change any values.
CN104 on the mainboard which goes to the buttons read as follows:
1) 3.3V
2) 3.3V
3) 3.3V
4) -1V
5) Jumps around 2.6V
6) 0
7) 0
8) 0
Again, pressing power button changes nothing.
While testing diodes, I did come across one value that seemed strange. D852, which is near the bottom left corner of the transformer reads 0.433V one way (good), but also reads 0.911V the other way.
I'll be honest, I'm still a novice but definitely willing to learn. I've learned a lot already but still missing quite a bit. Any ideas on what to test out next?
Wish I had a schematic for this board as I'm sure it would make things a lot easier.
I have replaced the caps on both the power and mainboard but no change.
Voltages on cable coming off of the power board read as follows (plugged in, no power):
1) 5.03V
2) 5.03V
3) -1mV (milli)
4) -1mV
5) 139.5mV
6) 2.355V
7) -9.6mV
8) 0.65V
There are no markings as far as what pins are what. Pressing power button does not change any values.
CN104 on the mainboard which goes to the buttons read as follows:
1) 3.3V
2) 3.3V
3) 3.3V
4) -1V
5) Jumps around 2.6V
6) 0
7) 0
8) 0
Again, pressing power button changes nothing.
While testing diodes, I did come across one value that seemed strange. D852, which is near the bottom left corner of the transformer reads 0.433V one way (good), but also reads 0.911V the other way.
I'll be honest, I'm still a novice but definitely willing to learn. I've learned a lot already but still missing quite a bit. Any ideas on what to test out next?
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