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Help Motorola HT 750

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Couldnt open port. Check whether device/ rib are powered on

I am using windows 7 operating system with i believe 32 bit system, will verify and correct if needed. I am using a usb style cable purchased off ebay. I downloaded the cps off of this site from a very helpful person. I was told i needed version R06.12.06 for programming the HT750 which i should of stated from beginning that is the radio im am having issue when going to read radio. It say "couldn't open port i tried using the drivers that came on disk that came with usb cable but it wouldnt allow to install from disk because it was in a Japanese/ Chinese language so i did a driver search and installed driver then did a second search to verify driver was up to date. Still getting "couldn't open port check whether device is powered on" . I tried with multiple good batteries still will not read. I read to delete other drivers and start from scrath with PL 2303 driver. That is where i am at at this point. Also tried using lowest COMM seting possible .
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location USA
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usb again .serial all the way:'(

R.G TWO-WAY RADIO Electronic & consultant
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After the amount of infornation ive been gathering im probably just going to order serial adapter found one for $18 US im still going ro try to install PL 2303 driver already deleted all other ones and am going to start from scratch with much more knowledge than i started with thank you all for the information coming from. NJ USA volunteer firefighter trying to figure out how to program his portable
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my friend let me tell you alittle story about usb cable .i only used when i cannot get the cable in serial .to much driver .issue .i have some  ht 750 radio which i program with my serial cable no issue at all.take a look#https://www.ebay.com/itm/Serial-Programming-Cable-Motorola-Radio-HT750-HT1550-HT1550XLS-DB-9-GP328/162574140629?hash=item25da2c84d5:g:YRIAAOSwpiNZupkU (Serial Programming Cable Motorola Radio HT750 HT1550 HT1550XLS DB-9 GP328 | eBay)


:thumbs:

Last edit: by tech


R.G TWO-WAY RADIO Electronic & consultant
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Make sure to delete all previous drivers.  Also, when using USB, the comm port can be any number.  My computer has it ports 12-20.  The HT 750 version depends on the firmware in the radio but the newest software will program it.
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Ok well i dont want to one of those people who ask for help and dont respond to the tips but as of yet i been so busy remodeling kitchen and fire academy classes my days have been long with work and everything else but i will be attempting with Prolific driver soon i already deleted all other drivers that came from disk with cables and then the ones i searched and updated myself will report back soon. Thank you all again for info very helpful
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Having same issue. Wo dering if you solved this? Im windows 10 though 64 bit. I do know however the cable works as i can use my tuner program to read what the settings are on the radio. Just can get CPS to work.
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The R06.12.06 runs best on XP, but, the global tuner does not.
I don't think this s/w runs on 64 bit platforms.
In mucking with many radios I have multiple PCs; DOS only (a very old prehistoric 286!) a basic DOS 386,  XP, and 8.1 home.

I would recommend even buying a basic hard drive and installing XP SP2 32bit on it for programming. Swap drives as needed. or, find a cheap PC and replace the power supply (they usually burp after about 6 years) and set it up as an XP programmer, no internet access at all.
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