Nexstar+ programming

[sharpesrifles]

I have a nexstar 4se with nexstar+ handset. Recently I switched on and it read 'Boot loader invalid pkg 0010'. Have tried to re-programme using CFM 1.9.4200.  CFM recognises scope and I can get the handset to read 'Boot loader use key pad entry' but CFM will not download anything to the scope. Does anybody know if I have trouble with handset or is it the mount?

[stevend]

Probably the handset ? I had the same/similar error message shortly after getting my Nexstar 127 SLT from FLO. I spoke to them, they replaced the handset and all was well.

[sharpesrifles]

Thanks. Am waiting for a reply from retailer. The scope is only 9 months old so hopefully they will replace.

[ronin]

All I can see is that you need 2 cables to connect things up with - do you have them both ?

Everything refers to "Boot loader invalid pkg 0002" and "Boot loader invalid pkg 0080" nothing I can find states "Boot loader invalid pkg 0010".

However from the description I would expect it is saying that packet 10 has failed a CRC or similar, either before or after it was downloaded and expanded.

In effect the number is not overly relevant.

If new contact the retailer, may be easier/safer/better to get a replacement.

Just thought, this is not another USB-Serial problem where one converter and drivers work and another doesn't ?

If you an drop the speed down, that sometimes helps.

[sharpesrifles]

What 2 cables do you mean? I have the serial cable from the handset which connects to a usb adapter  for the computer.

[ronin]

It came from this:

CSupport

The last bits says:

Here is information on the other cable you need:

http://www.celestron.com/science_education/cable-nexstar-rs-232.html

Have no idea what it is or if you still need it for your scope but it looked relevant.

[Blazar]

I have done this recently when i had my boot loader error...

I had to order  a specific USB to serial cable (mentioned in a previous thread) (I ordered the trendnet one) these were links from the Celestron website.

Here is information on the USB-RS232 cable you need:

http://www.celestron.com/c3/support3/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=1698

 

Here is information on the other cable you need:

http://www.celestron.com/science_education/cable-nexstar-rs-232.html

[stevend]

 which connects to a usb adapter  for the computer.

I think the SE range come with the correct handset to serial cable, but be aware that not all serial to usb adaptors are equal. Some do not do the job, I think it is to do with the chipset.

[sharpesrifles]

Connection has been working OK since scope was new, about 8 months. So do not thing is is the cable.

[sharpesrifles]

Thanks for all your help, but I got in touch with David Hinds and it was the security settings on the computer. Lowered settings and handset updated OK. Still do not know why it happened in the first place!!!!

[ronin]

Glad it is sorted, another thing to remember then is that there are security settings (?)

Have to say worked in embedded software for years and the way that scopes do the loading of software seems diabolical.