Re: BIG Problem
- From: Paul <nospam@xxxxxxxxxx>
- Date: Fri, 11 Jun 2010 16:09:24 -0400
I took the mobo out of the case and placed it on cardboard. I applied AC power and was able to get the case power LED to glow in response to pressing the case power button. I still do not get (1) any beeps from the piezo-electric beeper (I can see the piezo on the mobo), (2) no movement of the CPU-mounted fan (3-wire connection to mobo for speed control), and (3) any output on the monitor. All of the above were true before and after I removed all connections to the mobo, other than the 20-pin and 4-pin power connectors as well as removal of the DDR2 memory sticks. The logical conclusion, as indicated by items (1) thru (3) above is that the CPU is NOT running -- since EACH of those items requires the CPU to execute BIOS code. Furthermore, I cleared the CMOS data by applying the jumper as per the manual's instructions, and also measured the CMOS battery voltage to be 3 volts. (I used a wrist strap connected to ground when working on the mobo.)
The processor I installed was an new Intel socket M Core-Duo processor T2450 (SLA4M). It is a PGA package device. The mobo supports a broad range of socket-M PGA CPUs, both single and dual core including a CeleronM. I don't think I have am using an incompatible CPU. Thus the question is: WHY ISN'T THE CPU RUNNING AND EXECUTING BIOS CODE? Observation: I do sense a very slight warmth under the CPU when the power is ON. All I definitely know is that the power supply provides the correct voltages to the mobo and the mobo's hardwired power-button & associate LED logic functions.
Could there be connection problems between the mounted CPU and the mobo socket? I guess I can remove and reinstall the CPU and heat-sink/fan to find out. Any other suggestions?
CPU-World says that processor is socket M and they provide this page with
information on the socket.
"Instead, the socket has a special actuator that needs to be turned
by about half-turn to lock or release the processor."
That is a zero insertion force (ZIF) socket, where instead of a lever to
work the contacts, a screw closes the contacts. You can see the lock screw
at one end of each socket picture.
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