Apple IIe Garbled Video

4 posts / 0 new
Last post
Offline
Last seen: 4 years 8 months ago
Joined: Apr 11 2020 - 15:04
Posts: 2
Apple IIe Garbled Video
AttachmentSize
Image icon a1.jpg1.59 MB

I recently picked up an Apple IIe. It boots on, and beeps like it normally should, but I get garbled video like in the image shown. There appears to not be any wrong (as far I can see) with the motherboard or traces. Is there a certain chip that would cause this?

Offline
Last seen: 2 years 8 months ago
Joined: Mar 31 2020 - 19:55
Posts: 848
The order of things to attemt

The order of things to attemt relacing for this, are:

 

RAM

CD ROM

EF ROM

 

I personally would suspect the EF ROM. There is a minor chance that it is the character generator, but with that kind of outut, I doubt it. 

Please also verify that you are connecting the composite port to an apropriate composite-in port, and that your signal frequency is correct (NTSC or PAL, depending on the //e system; you did not specify).

 

Offline
Last seen: 4 years 8 months ago
Joined: Apr 11 2020 - 15:04
Posts: 2
Yea its an NTSC Apple IIe

Yea its an NTSC Apple IIe connected to an NTSC LCD. Do you know which chip would be the EF Rom? This is my first Apple computer, Im much more familiar with the Commodore brand.

Offline
Last seen: 8 hours 1 min ago
Joined: Jun 18 2010 - 13:54
Posts: 798
If the computer beeps, the

If the computer beeps, the CPU, RAM, and ROM are probably OK.

Looks like a video issue; possibly incompatibility with your LCD display. Do you have a TV or CRT monitor you can try?

 

Otherwise, there are numerous sites you can check to see which chips generate video and could be faulty.

Log in or register to post comments