8 Replies Latest reply: Jan 21, 2013 11:06 AM by Walter Wedler
Walter Wedler Level 2 Level 2 (225 points)

Since the storm I get: "Check monitor cable" every time I either turn off my Samsung SyncMaster 244T monitor or shut down my Mac Pro running 10.6.8.

It use to come back on in ~10 seconds. The "Check monitor cable" message only goes away when I push the monitors source button after which "digital" returns and everything works normal (even restarts). I unpluged the monitor cable at the monitor and my Mac changing power-strips, outlets has not changed anything.

It is taking longer and longer after a shut down for me to get everything back to normal. If the cable would be bad (I don't have an extra one), why is it working normal when I leave everything on? My question is: Is it the system, monitor, video card, resetting, what are the logical steps to figure this out?

Please help.

                    Walter

  • Grant Bennet-Alder Level 9 Level 9 (53,100 points)

    The "Check monitor cable" message only goes away when I push the monitors source button after which "digital" returns

    Where is this button? If on the display, the problem may be in the stored configuration in the display. Does it have its own backup battery?

  • The hatter Level 9 Level 9 (60,850 points)

    While trying to access the damage... pickup a CyberPower 1500VA UPS

  • Walter Wedler Level 2 Level 2 (225 points)

    Thank you for your reply Grant Bennet-Alder. The button is on the Samsung SyncMaster 244T monitor, has an AC cable going in so itmust have a power supply. In the mean time I got a new signal cable (sorry I said monitor cable).

    The first time when I used it the problem looked like fixed. But when I shut everything down and restarted I got the "check signal cable" on monitor screen again. So it is not the cable. Strange. I have to see what happens when I turn everything off over night.

                                                                                               Walter

  • Walter Wedler Level 2 Level 2 (225 points)

    I had my monitor off for a couple of hours with the new signal cable. Trying to put it back on, it takes forever till I get the same from before "check signal cable (analog). After I push source on the monitor it says digital again and everything works normal. So, it was not the cable, what next? I reset the SMC, same problem.

                                                                                                                                                 Walter         

  • Grant Bennet-Alder Level 9 Level 9 (53,100 points)

    It sounds like this is a problem with your multi-input display. The display does not seem to be remembering what the last-used input was, _OR_ it is not switching to digital when digital is available.

     

    If there is a backup battery inside, it may need a new one. Otherwise, I suggest you contact the manufacturer to see if there is some sort of Deep Reset you can perform to get it to remember (or switch automatically) more faithfully.

  • Walter Wedler Level 2 Level 2 (225 points)

    Thank you Grant Bennet Alder.

    There is no battery, the SyncMaster 244T is plugged into AC. The manual does not show a reset, I will try to contact Samsung and post back.

                                                      W.W.

  • Grant Bennet-Alder Level 9 Level 9 (53,100 points)

    The reference to a battery would be a tiny coin cell that helps the device remember important parameters, not a battery capable of powering the whole display.

     

    Many devices, including your Mac Pro tower, have such a backup battery.

  • Walter Wedler Level 2 Level 2 (225 points)

    Thank you I will search the manual for such a battery.

                                                                                       W.W.