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I stored some broken video boards as backups, but I don’t know how to switch the memory chips by myself. So, those backup boards for me are still useless.

It works! I saved 3 cpu boards. Thanks man. And now, I am also facing the video chip issue. It says bad IC 70 and IC 71. Not sure what to do to fix it.

Okay. Let me try. Thanks

I just reconnected the wires and used a meter to check and make sure the 3 points are connected. Still having bad luck. The issue is still there :\

Yeah, I have reconnected the wires and cleaned the PCB, but the situation remains the same. I can’t see any leakage from the capacitors. Just don’t know how to fix it.

Got it. Thank you for your suggestion. Let me test the trace as well.

Yeah, you are right! Let me reconnect it again. Thank you!

Hi man1aco, could you please share what pings you made connection to fix the issue? it seems you connected IC33 Ping 9 with IC24 Ping 20. Not sure what you have wired on the back side of the PCB. Thank you!

Hi Waiji, My 2 cpu boards have the same issue and I have followed your instruction and connected the 3 points with wire (please see the attached picture). I had bad luck. it doesn't work. Have I missed anything?

Cool! That's awesome. It will be easier for me to swap the chassis since I don't need to change the connectors. Thanks again for the info! :D

Got it. Thanks for the information. One more question, are they also sharing the same VGA board and power cable?so I can use only one set of the vga board and power cable on all the chassis you mentioned above without modifying the connectors.

Cool! That’s good to hear. Thanks for answering. I will give it a try.

Hi all, I just got a free Toshiba PF D29C051 with A68LZU185X tube from my friend. I am planning to replace the bad chassis and wondering if there is any compatible chassis I can use in case I can’t find the original one(PD2367) Can I use PD1843 and PB9929 on the tube since they are all for...

Thank you both for the suggestions! i will give a try. Since i am away from my house, probably i can do it this weekend.

I see, so toothpick is not good for the coils. :\

Thanks, I didn't touch anything,I was afraid to break the chassis by my wrong actions. Will jamming a toothpick in those ferrite core and coils shirt-circuit the Chassis? Yes, it doesn't seem that the flyback creates the noise.

Yeah, I saw some discussion in the forum talking the yoke's noise issue. but I don't think it applies to this case, cuz when I use the another chassis with the same tube and yoke, the buzzing sound doesn't come out.

Didn't pay attention when I was adjusting the brightness. i will definitely check it out to see if it's the same issue. Thanks for sharing!

Hi guys, just replaced an used MS2931 chassis for my Blast City. It works good, but i heard buzzing sound from the chassis. The sound seems coming from the left side on the chassis. video here and the sound is louder while playing games with 15K res. ( it's smaller with 31 res) Just want to...

cool! Thanks for your suggestion :)