Thread: Is this nuvi 2589 simply Bricked or is it a Hardware Failure?

Nuvi 2589LMT Bricked

MODEL: Nuvi 2589LMT
IC: 1792A-A4BVG03
FWVER: 8.80
HWID: 1947
No NV backup
How it got bricked: Unknown; it worked for 7 years (with periodic updates), then yesterday it just didn't.
Symptoms:
1. Garmin logo displayed forever (most tries)
"System Software Missing" (once in a while)
Same behavior on battery, USB charge cable, USB data cable, Traffic Update cable
Same behavior with microSD card in/out
2. Hard power off (depress POWER for > 8 seconds) usually reboots instead of powering off
3. Power up by connecting data cable does not show any new device in Device Manager
4. Pre-boot behavior: (invoked by thumb on G after Garmin logo appears)
SYSTEM is displayed for about 8 seconds; Windows detects an Unknown device;
Garmin Express does not react
Then LOADING... is displayed, and the Unknown device goes away
LOADING... displays forever until hard power off
Host computer:
Windows 10-64 on a Lenovo Thinkpad T430
Garmin Express installed, currently version 7.17.2.0, not running by default
Nuvi 2589 successfully updated many times in the past with this USB data cable
Cable is on a Docking Station USB port i.e. internal hub
Also have previously used a direct laptop port which is also a hub
All this DOES NOT MEAN THE DRIVERS ARE INSTALLED,
I had to explicityly download and install USBDrivers_2312.exe from Garmin
per link "Garmin: USB Drivers Updates & Downloads" ([Only registered and activated users can see links. ])
posted in thread, "IMPORTANT! If you want HELP in case of a bricked Garmin device, please follow this".

WHAT I'VE DONE

1. Download and install Garmin USB drivers 2.3.1.2 and restart computer
2. Plug in cable. If nuvi 2589 was off, it powers up to Garmin logo forever
(or occasionally SYSTEM SOFTWARE MISSING)
3. Start G7ToWin. (No special compatility settings nor Administrator.)
Select USB communication.
4. Hard power off nuvi 2589, it immediately powers up again
5. Quickly press and hold G in Garmin logo forever
6. Nuvi 2589 displays scrolling "SYSTEM" and Windows sees an Unknown USB device
7. Quickly in G7ToWin do GPS | Get GPS ID
G7ToWin spins about 10 seconds
(nuvi 2589 switches from SYSTEM to LOADING... and Windows stops seeing the device)
then G7ToWin returns a popup
"USB Error: WaitComplete: Error waiting for overlapped I/O" .
When I dismiss the popup I see
"nuvi 25x9 Software Version 8.80 ID: 1947
Unit ID: xxxxxxxxxx; USB Comm via Bulk Pipe"
8. Nuvi 2589 displays LOADING... forever and now Get GPS ID pops up "invalid handle"
and returns nothing
9. I don't know if it's in preboot mode, or just got comm-lucky partway there and
then froze.

I don't want to rush ahead and possibly wreck it worse. Given the symptoms, what do you suggest next?