A55 does not start; power indicator not now

We have an A55 (8705/J3U) just out of warranty (exp. 1 June) that will not start. Feeding tests as good all around (Antec tester), confirming the green power LED 115V on the back. Fans and HD light and service HD LED lights up green in the face, but the front works indicator LED will glow. No beeps for diagnosis, without video to see the POST messages and no set rotation of CD/DVD to try to start like that.  Have replaced the range cables for power, electric, front power switch & led and HD set.

After reviewing other threads, I see that "[i] f the power button is pressed and the light does not illuminate, then boot block recovery will not work."  If the USB and BBR idea floppy drive looks (and in any event it is did nothing for the PC recently that operating system Windows and usual Office patches: no update of the BIOS).  After you verify that the power supply is good, am I now backed up to no way out (1) new card system, or (2) new PC?  (Because the power switch itself will begin the HD & fans, and it taking four seconds will turn the fans and HD market back, I'm not inclined to think that a new power switch will work.)  But I am open to learn... TIA for any help Yes.)

Motherboard, that's what I would try next also after reading all of the symptoms you mention.  Your food is really good and it seems that the switch works.  There is the possibility that the LEDs on the switch Assembly may be interrupted, but its doubtful.  A dead CPU could also cause the errors you mention, but it is the least likely to fail.

Tags: ThinkCentre

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