4.1V is what you would expect....actually a little higher as you usually lose .6V across the diode giving you 3.9V, which is more than sufficient to store the memory contents in RAM.

Have you tried a factory reset? If that doesn't clear it up, i'd suspect bad RAM.

Overheat the chip or pop it with some static from the iron maybe?

good luck, I hope you can fix it. I have wanted a HS but there have been so many threads lately about problems with them I am having second thoughts.

Interested to see the outcome.

Good catch and good to know

I wanted to add to this in case someone has the same problem. Just bought a High Speed and the first issue was the "Adjustment Failure". It would go away for some reason and then come back again.

I read this post and fixed it. However, in my case there was door button. The issue was any time you unplugged the table or changed the batteries, the next time you turn it on it would give the adjustment failure. I just started the machine holding the door button in with my finger. First it displayed "Factory Reset" and the next start it was fine.

I have the issue every time I change batteries. And oddly, on mine it seems to be sorted out by changing back to "free play" in the settings. I don't have a coin mech, and for some reason the default goes back to paid play, and gives this adjustment failure until I set it to free play. Hope this helps someone.

Chaos

To avoid loss of memory when you change batteries... Change them with the machine on....

I just bought an otherwise well-working HS last week. However, I've been getting ADJUST FAILURE every single time I turn the machine on. After reading this thread, I started playing with the door switch when this happens, and seems like after 5 times of pushing it, the Audits then become available again. At that point, all the audits are reset (including the free play so this is very annoying). Any ideas on what the problem might be? Door switch?

Heymarcus, I had that problem as well. For me, it turned out that there was a bad connection on the battery holder.

I installed a remote battery holder (with the same new batteries) and it has been working out.
It has also stopped two other small weird problems that kept coming up - a switch failure at startup and two-ball multi-ball (vs. normal 3-) during game play. Don't know if that is common to stop those other problems across other pins / system 11's but it worked for me.

Just had this problem on my new Grand Lizard after changing the batteries. The solution Woofer768 mentioned worked for me.