Was just after a case, but it came with this board.
Replaced the dead CMOS battery, and reset the RTC RAM with the jumper
The green light on the board lit up, when the PSU was plugged in,
and the CPU fan spins, and the green keyboard lights flash once, when turning it on - but no BIOS beep or video.
Cannot power down the board when holding down the power button - it can only be powered down by using the on/off switch on the back of the PSU.
Draws 27W with just the hard drive connected.
In the vicinity of the RAM, there is two AT9173 Bus Termination Regulator (driver?) chips.
Here is the measured voltages on the pins:
From the close up photo,
The chip on the left, circled red
(and according to the pinout on this diagram : https://pinouts.ru/Memory/dimm_ddr2_pinout.shtml)
My multimeter measurements are:
1. IN 3.41V
2. GND 0V
3. REFEN 1.06V
4. OUT 1.06V
5. VCNTL -0.01V
6. VCNTL 5.12V
7. VCNTL 0V
8. VCNTL 0V
The chip on the right, circled yellow
1. IN 3.41V
2. GND 0V
3. REFEN 0.03V
4. OUT 0.05V
5. VCNTL 0V
6. VCNTL 5.12V
7. VCNTL 0V
8. VCNTL 0V
These measurements don't seem to align with the "typical application" schematic that is shown in the datashheet
https://pdf1.alldatasheet.com/datash.../AT9173EG.html
There is two RAM slots, and they both only have 0.05V on the VDD and VDDQ pin.
The two MOSFETS, that are on the left hand side of the slots, are not shorted
Any ideas as to what's gone bung?
Replaced the dead CMOS battery, and reset the RTC RAM with the jumper
The green light on the board lit up, when the PSU was plugged in,
and the CPU fan spins, and the green keyboard lights flash once, when turning it on - but no BIOS beep or video.
Cannot power down the board when holding down the power button - it can only be powered down by using the on/off switch on the back of the PSU.
Draws 27W with just the hard drive connected.
In the vicinity of the RAM, there is two AT9173 Bus Termination Regulator (driver?) chips.
Here is the measured voltages on the pins:
From the close up photo,
The chip on the left, circled red
(and according to the pinout on this diagram : https://pinouts.ru/Memory/dimm_ddr2_pinout.shtml)
My multimeter measurements are:
1. IN 3.41V
2. GND 0V
3. REFEN 1.06V
4. OUT 1.06V
5. VCNTL -0.01V
6. VCNTL 5.12V
7. VCNTL 0V
8. VCNTL 0V
The chip on the right, circled yellow
1. IN 3.41V
2. GND 0V
3. REFEN 0.03V
4. OUT 0.05V
5. VCNTL 0V
6. VCNTL 5.12V
7. VCNTL 0V
8. VCNTL 0V
These measurements don't seem to align with the "typical application" schematic that is shown in the datashheet
https://pdf1.alldatasheet.com/datash.../AT9173EG.html
There is two RAM slots, and they both only have 0.05V on the VDD and VDDQ pin.
The two MOSFETS, that are on the left hand side of the slots, are not shorted
Any ideas as to what's gone bung?
Comment