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[Console Repair/Mod Center / Re: Pc-Engine DUO - White Screen - No sound, No Boot, No Bios loaded]

Hi

I changed IC520 composant .. same problem
I removed HU6280, cleaned and reflowed it...  same problem   

Next, i will try to reflow HU6270 but i'm not really hopeful

Seems this console will join the graveyard 

[Console Repair/Mod Center / Re: Pc-Engine DUO - White Screen - No sound, No Boot, No Bios loaded]

Thanks a lot for your help !

I'll do everything you asked me to test and get back to you

 

[Console Repair/Mod Center / Re: Pc-Engine DUO - White Screen - No sound, No Boot, No Bios loaded]

Hi Keith Courage,

Thanks for your reply and for your time.
I checked both regulator voltage and i obtained about 10V IN et about 5V OUT. Seems its Ok.
I checked many time the Mainboard and i dont see any burning traces or corrosion.
i checked under the hucard port for see all points and all pins, no corrosion or other.

i m so frustred  I want to understand what the problem is... even if I can't fix it.

> Im ready to test HU6280. PLease can you tell how to test ? i have another Working PC engine duo. Maybe i can take values from working console and compare with not working console ? Need osciloscope or only multimeter ?

Thanks a lot

[Console Repair/Mod Center / Re: Pc-Engine DUO - White Screen - No sound, No Boot, No Bios loaded]

Hi,

I guess i checked Reset Pin. But i checked only continuity signal.

IC901 (C6280) pin 11 > HUcard port pin 36 continuity OK
IC903 (C6270) pin 24 > Hucard port pin 36 continuity OK

Is this the right way to test RST pin ? or i must to test something else (about RST)?

Thanks a lot 

[Console Repair/Mod Center / Re: Pc-Engine DUO - White Screen - No sound, No Boot, No Bios loaded]

Thanks a lot.

For help myself, i just bought an new Multimeter/Oscilloscope for testing composants and some values.
I will test and share my results.

Yes i readed some topics with similars issues but each have differents reasons.. but you are right, there are many informations in each of these topics.

thank you to for asking the Thesteve, i will start as he said.

Pc engine will not died !

[Console Repair/Mod Center / Re: Pc-Engine DUO - White Screen - No sound, No Boot, No Bios loaded]

Hi

Full recap was done. Always white screen 

I dont know what i can check now.
No burning points on the mainboard.

What could I consider to be the cause of the problem? It is Hucard port issue or Gpu/cpu issue ?

It seems that the white screen can come from many sources.... i dont know where to start 

If people have some tips ! thanks to share it

have a nice day

[Console Repair/Mod Center / Re: Pc-Engine DUO - White Screen - No sound, No Boot, No Bios loaded]

Thanks !
  Ok I will change all Caps first and i will make feed back.

[Console Repair/Mod Center / Pc-Engine DUO - White Screen - No sound, No Boot, No Bios loaded]

Hi people,

First i would like to say that this forum is a real informations treasure !
Thanks a lot to people who help other people to find solution about PC engine Console. 

Today i have a problem with a Junk Pc Engine DUO i bought.

When i power on it, there is nothing on the TV, only white screen.
Always white screen, with Hucard, Without Hucard. No sound, no CD-rom BIOS..

I checked continuiting points from IC513/IC513 and IC515 with multimeter > Its OK

I replaced some Caps but always same problem. I check Hucard ports and cleaned it with Propylic alcool then looks good... It's seems no burned points on mainboard or under the HuCard port, i checked it.

My questions are :

> What are the first video capacitors to be changed ? Do I have to change them all ?

> What are the first tests I need to do for check that the Video/GPU or Sram or CPU chipsets are OK?

> I read that the chip C6270 can be dead. How i can check it and confirm ?

I'll take any advice about White Screen problem, I really want to find a solution  

Thanks to all