Went to start the car, battery totally dead. New battery only 2 months ago. Nice long run before the problem, and car left for just a few days before the dead battery problem. Put it on Ctek-type charger (optimate), and after 24 hours, the charger was still trying to put full charge into the battery, which was only partially charged, still quite flat.
So, read up forum threads on the battery. There was a thread from SOV211 about the red warning triangle being on, and plugging things into the OBDII port.
So, a quick look showed me that the locked car still had the red triangle on, and shortly before the issue an auto rescue man (very helpful) had plugged into that port. Battery not "hard reset" after.
So, I've now disconnected the negative lead, have the optimate charging the disconnected battery, and hopefully it will be problem solved when I reconnect.
So thanks SOV211 and all on the forum.
I imagine there will be various things on the trip computer etc that I'll have to re-set?

 

You may have to reset the windows, and possibly the date and time, if that doesn't get set from the internet. You will have lost your trip values.

 

Yep, last time I disconnected the battery (a couple of weeks ago) I had to reset the windows (to one press up) and the time and I lost Trip A and Trip B.
That was it.

 

Thanks; how do you reset the windows?

Actually, just found it in the manual, so all good!

 

From User Manual (p140)

WINDOW RESET
The windows will need to be reset if the battery
is disconnected, becomes discharged or power
supply is interrupted.
Reset as follows:
1. Close the window fully.
2. Release the switch, then lift it to the close
position and hold for 2 seconds.
3. Open the window fully.
4. Release the switch, then push it to the open
position and hold for 2 seconds.
5. Lift and release the switch to operate the
one-touch function.
6. Repeat the procedure on each window

 

My manual says the same, but like a few others here I have found that it works ONLY when driving ie the car must be moving, go figure.
Just a heads up in case it doesn't work for you and you are left scratching your head.

 

I liked the battery idea, but noted in your original post that you'd already replaced it. Just in case, I might add to put it on a CTEK to make sure it's fully charged.

 

Thanks all for the advice. Yes, I put it on my optimate (CTEK type charger) overnight with the battery disconnected at the negative terminal. Battery now right up. Re-connected, and the red triangle goes out after about 10 mins after locking, so all good I think!
I'll do the window resetting next time I go out. Can't do it right now; just setting off in the E Type for a charity run. We'll be stopping off for coffee at Nick Mason's house! (Pink Floyd) He has an extensive collection of classic cars, so we've been welcomed to park on his lawns. Not sure if he'll be there himself, but if so a good chance for a selfie! Pink Floyd and Led Zep were always (and still are) my favourite bands. Sorry if this is off topic!

 

My banks obd gauge shuts down and red triangle disappears exactly as it did before

 

no window problem however tire pressure reading is not working have put about 100 miles on it still reads 00 on all four wheels ,

 

@JagFR had a similar issue a few months ago.
A battery reset (disconnect ground/negative wire for 10 minutes) is what fixed his TPMS readings, IIRC.

 

The obd port retains a perm live after shutdown so your idash is still taking a small draw
my obd port has a cable with a on/off switch feeding the banks guage which I turn off so no power sap