Try burning at 25v?

I can't read the imprint on the chip but typically....

2716 = 25v
2716A = 21v
2716B = 12.5v

The majority of 2716 i come across burn at 25v, not 21v.

Look for people selling 2716B but be careful... the remarkers from China often screw up the suffix on EPROMs that indicate programming voltage.

Nobody close by in Europe is selling these old ROMs?

I have one of these programmers and it's a shame they didn't build in 25V support.
2 or so years ago with my TL866 I programmed an original 2716 (don't remember brand or if it was an A version) but it was marked as 21V. The TL866 programmed and verified ok (even reading it back, the data read ok), but the ROM would fail checksum tests in my Pinball. After reading 2716 in an older programmer the data read back was wrong. It's unusual that the TL866 continually read/verified it OK - maybe it was a +5V supply voltage variation. I reprogrammed the chip in my old programmer at 25V and it worked fine.
Anyhow just be careful of this scenario.

These days I'm using this TL866 programmer to program some used ST M2732AFI 21V FAST chips I got from China and they work just fine.

Hmm, as barakandl mentioned some of these chips from China are incorrectly marked (rebadged). If you look at the 2716 EPROM datasheet from ST, the programming voltage is 25V, not 21V.

It may be worth getting some 2732A chips as well, they are also cheap. ST made these to program at 21V. You can always double the data to make sure they work in place of a 2716.

Best of luck with it and let us know if the ST 2716 program ok at 21V when they arrive.

subscribed - I'm curious how this programmer works. I wouldn't mind having a backup.

You mention it was erased. How was it erased? Under UV light?

If you insert an EPROM backwards in a game, almost always it's ruined. It will erase, but it will never program again.

Also, if it's an 'A' suffix part, like 2732A, it programs at a lower voltage, and I've gotten lots of these in the past where I postulate someone programmed it as a regular 2732, which succeeded, and then it never programs again.

It's a handy programmer; I have the TL866A which has the extra feature of In Circuit Serial Programming for Microcontrollers and SPI EEPROMS over the cheaper TL866CS but I haven't used the feature yet.
But as mentioned above the lack of 25V programming support is an issue in this arena unless you're stocked up on 21V or lower parts.
There is plenty of discussion on this programmer here if you're interested:
www.eevblog.com/forum/blog/eevblog-411-minipro-tl866-universal-programmer-review/

Umm, this is probably the hard way but if you're using a Windows PC, you can do it in a Command Prompt (assuming you're familiar with it). The command is something along the lines of:

copy 2716file.rom /b + 2716file.rom /b 2732file.rom

Replace "2716file.rom" with the name of the 2716 file you need to double.
"2732file.rom" will become your new 2732 rom file.

Actually, you can also do it in the MiniPro programming software. Select a 2732 device. Load your 2716 file with the "From file start address" set to 00000 and the "To buffer start address" set to 00000 and click OK. When it's done, open the file again but this time change the "To Buffer start address" to 00800 and click OK. Then program your 2732 and/or save the file as a new 2732 version.

Hope this helps.

If it was reading all "FF" before you tried erasing it, then it sounds like the 2716 might have been dead.
Was there a sticker covering the EPROMs window when you first saw it?

Check the date codes on them. They usually say 2012 or something like that. Pretty darn sure STMicro was not making 2716 EPROMs in 2012. Those are remarks and probably burn at 25v. I see them all the time say 21v right on the chip and it isn't correct.

There is also the chance the EPROM itself is bad. I have decently high failure rates using old EPROMs including the ones sold as new from China.

I recommend the GQ-4X with the external power supply. USB interface. Software works in windows 10 and is easy to use. It has burned every EPROM ive needed including 2532s.

ebay.com link: 10pcs AMD 2716 AM2716B UV EPROM 16KBit DIP24

the imprint font and eprom window contents look correct for the AM2716B (12.5v) that i have on hand. use at your own risk shopping components on ebay.

I have a GQ-4x. You have to attach external power for 25v programming because the USB port can only source 500mA of current which isn't enough for the boost circuit to create the 25v. I've squeaked out a few 21v chips with just USB a few times, but the 25v chips I've always had to connect an ext power supply. I'd have to double check but I believe you connect a 12v source to it.

Apparently the GQ-4X directly supports 2532 without the need for an adapter:
http://www.mcumall.com/comersus/store/mcumall_TrueUSBWillemsupportICs.asp
Although it says Read Only for 2532A. Not sure what the story is.

Apparently it doesnt burn 2532A... good thing i have NEVER seen a 2532A. It does 2532 just fine.

I used to see them all the time. Back when it was easy to find 2532s. These are out of my recycle bin - wouldn't program Probably because someone programmed them as a regular 2532.

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