I have a monitor, Sony Model: CPD 100 ES...Sony Trinitron Multiscan color computer display hooked up to a UMAX Supermax C600 (603e/240)....I can not figure out the correct code configuration on the INTEREX adaptor I have....do advise.
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There are multiple circuits for this model. I suspect your model is
PE1237. If so this model frequently has bad solder connections at the
AC socket. Also capacitor 2119 or capacitors 2041 & 2031 can cause
no power up. They normally are bulging if bad. If your model is PE1238 (BenQ), you may see bulging capacitors in the power supply.(1000uf/25v) Monitor Mike
There are multiple circuits for this model. I suspect your model is PE1237. If so this model frequently has bad solder connections at the AC socket. Also capacitor 2119 or capacitors 2041 & 2031 can cause no power up. They normally are bulging if bad. If your model is PE1238 (BenQ), you may see bulging capacitors in the power supply.(1000uf/25v) Monitor Mike
verify the settings for your monitor are correct. with a video card that supports an HDMI output you should be able to go into your display properties (maybe advanced properties) and either force the TV detection or force the HDMI output to be enabled so it's displaying on your PC and your TV simultaniously. I know with N Vidia GeForce video cards you can do this and with most major brands it should work similarly.
If you are sure the left monitor?s power is not the source of the problem it does sound like a shielding or excessive signal loss in a device/cable.
If it?s always the left monitor I would try unplugging the video cable that goes from the left monitor and plug it into the right monitor; do the same with the other monitor. If the problem moves to the right monitor then that eliminates the monitors and we move on. If the problem goes away then probably one monitor had more signal degradation than the other. If the problem stays then the monitor is the source of the problem.
If the problem followed the cable then I would exchange the cables that run from the switch to the monitors; if nothing changes exchange the cables that run from the switch to the PCs. If exchanging any of these cables results in the problem moving then you have a damaged cable or a bad connection.
If the problem is still on the left monitor unplug the cables from the left PC that run from it to the switch and plug them into the right PC; do the same to the right PC. If the problem moves then you might have a damaged switch OR perhaps the video card output on one of the PCs is weaker than the other.
All cables and devices weaken the video signal to some degree but the amounts can differ wildly. Over the years I?ve had this problem caused by cables, switchboxes, video cards, radio transmitters, bent connector pins, poor connections, excessive cable lengths, monitors and accumulative signal loss from several devices. The last is the hardest to diagnose.
Good luck and let us know what happens.