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Problem image PS5 EDM-031 CFI-1216A

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Hi, I'm new to the forum. I was hoping someone could help me with this console...
Has anyone encountered an issue with a console (model EDM-031 CFI-1216A) that powers on perfectly—showing the white light—but displays no image?
I’ve replaced the HDMI port twice, swapped out the HDMI encoder, and even reballed the southbridge just in case that was the problem, but nothing has worked... What I find strange is that when I turn the console on, it doesn't emit the usual startup beep; it simply powers up silently. It does enter Safe Mode, but it never actually displays an image. Has anyone else experienced this?
Thanks.
 
Last edited by Jrd5962,
I would check the readings at the HDMI port:

HDMI_port_readings_all.png
 
Hi, thanks for the reply. Yes, the readings are correct; I also checked for a short circuit in any component around the HDMI port or behind the encoder, and found nothing... it's really strange.

Edit: I've double-checked the readings and everything is fine, except that when the console is on, pins 15, 16, and 18 show 0.96V instead of 5.1V.
 
Last edited by Jrd5962,
On the right red 5V pwr line which reads in your case 1V are two 1.8k resistors and under them two Zener diodes (CDZVT2R5.6B).
I would remove the both resistors and see if the 5V are coming back. If so the six legged switch chip '15JL' (TPS2553) is ok and the issue is usually one or both Zener diodes.

HDMI_lines_SideB_pwr.png
 
Jrd5962 said:
Hola, gracias por la respuesta. Sí, las lecturas son correctas; También revisé si había cortocircuito algún en algún componente alrededor del puerto HDMI o detrás del codificador, y no encontré nada... es realmente extraño.
Click to expand...

stetofix said:
On the right red 5V pwr line which reads in your case 1V are two 1.8k resistors and under them two Zener diodes (CDZVT2R5.6B).
I would remove the both resistors and see if the 5V are coming back. If so the six legged switch chip '15JL' (TPS2553) is ok and the issue is usually one or both Zener diodes.

View attachment 593986
Click to expand...

stetofix said:
On the right red 5V pwr line which reads in your case 1V are two 1.8k resistors and under them two Zener diodes (CDZVT2R5.6B).
I would remove the both resistors and see if the 5V are coming back. If so the six legged switch chip '15JL' (TPS2553) is ok and the issue is usually one or both Zener diodes.

View attachment 593986
Click to expand...
Thank you very much. I'll give your suggestion a try and see if I have any luck. Regards.
Post automatically merged:

stetofix said:
En la línea roja de alimentación de 5V de la derecha, que en su caso marca 1V, hay dos resistencias de 1,8k y debajo de ellas dos diodos Zener (CDZVT2R5.6B).
Quitaría ambas resistencias y comprobaría si vuelven los 5V. Si es así, el chip interruptor de seis patas '15JL' (TPS2553) está bien y el problema suele estar en uno o ambos diodos Zener.

View attachment 593986
Click to expand...
Hola de nuevo. He quitado las dos resistencias y, al medir los pines con la consola encendida, los pines 15 y 16 marcan 0,26 V, mientras que el pin 18 se mantiene en 0,96 V. ¿Cuál sería el siguiente paso?
Post automatically merged:

stetofix said:
En la línea roja de alimentación de 5V de la derecha, que en su caso marca 1V, hay dos resistencias de 1,8k y debajo de ellas dos diodos Zener (CDZVT2R5.6B).
Quitaría ambas resistencias y comprobaría si vuelven los 5V. Si es así, el chip interruptor de seis patas '15JL' (TPS2553) está bien y el problema suele estar en uno o ambos diodos Zener.

View attachment 593986
Click to expand...
Hola de nuevo. He quitado las dos resistencias y, al medir los pines con la consola encendida, los pines 15 y 16 marcan 0,26 V, mientras que el pin 18 se mantiene en 0,96 V. ¿Cuál sería el siguiente paso?
 
Last edited by Jrd5962,
Finalmente logré obtener 5V estables en los pines 15, 16 y 18; reemplacé los diodos y parece que ese era el problema, pero la consola sigue comportándose igual... se enciende bien, pero no emite señal de video. Es un problema extraño...
 
Did you rechecked all the readings at the HDMI port? Are they all present and as expected (voltage, resistance and diode mode)?
 
stetofix said:
Did you rechecked all the readings at the HDMI port? Are they all present and as expected (voltage, resistance and diode mode)?
Click to expand...
Hi, I finally managed to fix the issue and now have a video signal on the console.
It seems the problem was with the Zener diodes, and the HDMI encoder was also faulty; I replaced it, and the readings are now correct. Thanks a lot for your help. Best regards.
 
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