Now I'm can't view the video (I'm on vacation, only with 0G internet on mobile phone). But the most common problem, the no 12V for video circuits. It is make a running screen (with colors). Tr2 transistor (BC337) dead by the dried out C9 capacitor. Replace both.

Yes, it is one screw under the label, at the corner near to the monitor conector (see on my page the Inventory, you can see many serial label photos). With sharp knife you can carefully blend up the label corner.

I've opened it. took some pictures of the motherboard and removed TR2 (BC337) and C9 (100uf, 10v). Will go to an electronic shop to buy replacement components.

Thanks for your help, I really appreciate!

Its strange. If I click the thumbnails it waits forever but doesn't shows the images.

If I take the links to another Firefox window they load.

Same for me. I think some incompatibility with the forum software and the image hosting server.

Slugman! If you don't mind then I'm can move your photos to the forum server.

Video issue fixed!

Thanks a million zozosoft!

No will see to add an expansion memory card and a SD card interface (saw the posts in the forum) hope it's still possible to order them.

Sorry, this is about another EP64 with a video problem, but I don't want to create a new thread with a similar title.

The unit had an insidious side video oscillation like when there is not enough +12v on the video circuit, but the owner has tested every single component on the +5v and +12v phases near the heat sink. Four years ago he started a thread about this on the RetroWiki web page, but I still was not a member.  Recently he has resumed his interest on fixing his EP64, and he has received and followed advices from very skilled persons, but all the tips have been unsuccessful.

Then somebody proposed I must repair it personally, thinking that I had a knowledge about Enterprises.... I have accepted, promising to put my best on resolving the issue, but with not a lot of confidence on my skills, only on my stubborn...  

Today the PCB arrived. I spent some minutes on connecting the board, show the video issue, then study the components.

At last I did my first check with the multimeter, on the two 7805 regulators on the heat-sink. When switched ON the PCB, one of the regulators had +4,89v at the output pin, but the other only +4,10v. "Can it be this?" I replaced the "faulty" 7805 with a new one. Now the values where similar on the two regulators. I plugged the video cable, and then the image was rock solid.

Stunned, I have just fixed an Enterprise almost by random...

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I have plugged it a new membrane and my EXDOS+HxC unit to test thoroughly the unit, and a DIR worked good on WP.