Inspire - Help needed for an senior citizen

Hello,

I am trying to help an senior citizen friend of mine who has HTC Inspire (S-Off) and all it does is vibrate 6-7 times and blank screen. I was able to get into hboot and below are the details of fastboot-getvar.

INFOversion: 0.5
INFOversion-bootloader: 0.85.0024
INFOversion-baseband: 26.10.04.03_
INFOversion-cpld: None
INFOversion-microp: 0438
INFOversion-main: 2.47.502.7
INFOserialno: XXXXXX
INFOimei: XXXXX
INFOproduct: ace
INFOplatform: HBOOT-7230
INFOmodelid: PD9812000
INFOcidnum: CWS__001
INFObattery-status: good
INFObattery-voltage: 3830mV
INFOpartition-layout: Generic
INFOsecurity: off
INFObuild-mode: SHIP
INFOboot-mode: FASTBOOT
INFOcommitno-bootloader: a3d4fa0f
INFOhbootpreupdate: 11
INFOgencheckpt: 0
INFOregion-id: 0

He got this unlocked phone from someone as a gift which worked for a while but now this is what happens:
1. Phone does not start (except for hboot screen)
2. Unable to do factory reset or get into recovery.
3. Unable to see device in adb. I am able to see my HTC M8, M9 on same system so I am guessing no issues with drivers there.
4. Fastboot oem lock returns error (... INFO[ERR] Command error !!!)
5. Fastboot oem get_identifier_token error (... INFO[ERR] Command error !!!)
6. Unable to boot into bootloader (fastboot oem rebootRUU) will reboot the phone and vibrate multiple times and then stays on black screen for hours.
7. Tried AAHK but no luck.
8. Tried flashing zip PD98IMG.zip with fastboot flash zip command but no luck.
9. Tried visiting htcdev for the unlock code but cannot see anything for this model.


All I need to do is get this phone up and running for this poor gentleman sole who gave me this phone with lot of hope... Doesnt matter which ROM or recovery..
I would really appreciate any help experts can provide.