Iwantgames:) Posted November 10, 2015 Share Posted November 10, 2015 OK tested my new TI's. One works the other has no video but makes a continuous annoying BEEEEEEP Quote Link to comment Share on other sites More sharing options...
Iwantgames:) Posted November 10, 2015 Author Share Posted November 10, 2015 Well I swapped out all the socketed chips. It stopped the beep but still no video. Quote Link to comment Share on other sites More sharing options...
Tursi Posted November 10, 2015 Share Posted November 10, 2015 It's not booting. That's all the diagnosis possible with the description of symptoms. Any picture on the screen? For the beep to stop, the system has to get far enough to start running the GPL interpreter. That requires working RAM, working CPU, and at least partially working VDP/VRAM. So all we can say so far is you appear to have at least some power. There are three power lines (+5, +12, -5) that you need to check, good a place as any to check. Socketted chips -- so the VDP and the GROMS? (And the clock, I think?) Is the beep stopped every time you power on now? Quote Link to comment Share on other sites More sharing options...
Iwantgames:) Posted November 10, 2015 Author Share Posted November 10, 2015 Yea it was beeping till I changed the VDP now it has no sound at all Quote Link to comment Share on other sites More sharing options...
Tursi Posted November 10, 2015 Share Posted November 10, 2015 Not even an initial noise? That implies it's not even powering on anymore. Check for crossed pins or backwards chips, or a disconnected power cable. Basically, on powerup, most chips reset, but the sound generator starts in a random state - this causes an initial noise that is unpredictable in volume and tone, but you're likely to hear it at least 2 out of 3 times. Once the system begins to boot, usually within a second or so, the startup routine will mute the sound generator and end the noise. Another second or so and the boot completes, and the system should display the title page with a short, crisp beep. Quote Link to comment Share on other sites More sharing options...
Iwantgames:) Posted November 12, 2015 Author Share Posted November 12, 2015 Just picked up another TI that boots (can here sound) but no video so should be able to make 1 out of the 2 Quote Link to comment Share on other sites More sharing options...
Like us on Facebook
Follow us on Twitter
AtariAge on Instagram
Watch us on YouTube
Chat on Discord
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.