Product Overview

This is a replacement back cover case for the Garmin dēzl 770 LMTHD trucking GPS navigator, priced at $50. This part is intended for units with a cracked, broken, or damaged rear housing.

Entity summary:

• Brand: Garmin
• Product family: dēzl 770 series
• Exact model: dēzl 770 LMTHD
• Part type: Back cover case (rear housing)
• Device type: Trucking GPS navigator

Compatibility

Confirmed compatible:

• Garmin dēzl 770 LMTHD

Not confirmed — do not assume compatibility:

• Garmin dēzl 570LMT, dēzl 780 LMT-S, dēzl 580, or dēzl OTR series. Even similarly-sized units from different generations may use different back cover designs, screw patterns, or internal battery mounting. Confirm your exact model before ordering.

Common Replacement Scenarios

This part is typically ordered to replace an original back cover showing:

• Cracked or broken housing (from drops or impact)
• Damaged or stripped screw mounting points
• Damaged charging/power port housing area
• Cosmetic damage from long-term dash/mount wear

Key Features

• Direct-fit replacement designed for the Garmin dēzl 770 LMTHD
• Restores the rear housing to original fit and appearance

Specifications

dēzl 770 LMTHD original unit specs (confirmed, for reference):

This part (replacement back cover):

Installation Notes

Replacing the back cover on a dēzl 770 LMTHD involves removing eight screws from the back plate and carefully separating the front and back panels with a plastic/nylon opening tool, working around the seam without disconnecting the internal ribbon cable that connects the screen to the motherboard. Since the case houses the battery and charging port connections, take care when handling internal wiring during reassembly. Professional installation is recommended if you're not comfortable with this type of disassembly. We do not provide detailed disassembly steps here beyond this general overview, as incorrect handling can permanently damage the unit.

What's Included

Not specified — please confirm whether this includes just the bare back cover shell or additional hardware (screws, battery, charging port assembly) before finalizing this section.

Buying Checklist

• Confirm your device is specifically the dēzl 770 LMTHD — not the 570LMT, 780 LMT-S, or OTR series, which may use different back cover designs.
• If your device also shows signs of not charging or not powering on, note that these symptoms are commonly separate battery or charging-port issues rather than something a back cover replacement alone resolves — check those components too if applicable.
• Confirm whether this part includes the battery or is an empty shell.
• Confirm whether professional installation is recommended for your comfort level.

FAQ

Q: My dēzl 770 stopped powering on completely and won't charge — is this a back cover/case issue?
A: Not usually on its own. One truck driver reported a brand-new dēzl 770LM that woke up completely dead with no response to any power source, even when connected to a computer — a symptom that typically points to a battery or charging-port fault rather than the outer case itself. If your case is also physically damaged, replacing it is still worthwhile, but a power issue usually needs the battery or charging port addressed separately. (Source: thetruckersreport.com)

Q: If my unit shows the Garmin logo, gets brighter, then shuts off — is that related to the case?
A: This specific symptom has been reported by other dēzl 770LMT owners even after replacing the battery and cleaning contacts, and iFixit's community troubleshooting points to checking the charging/power port connection and the motherboard for damage — not the outer case itself. (Source: ifixit.com)

Q: Does opening the case to replace it risk disconnecting the screen?
A: Yes, care is needed — iFixit's official teardown guide for this model notes that when prying apart the screen from the case, you should lift gently to avoid disconnecting the ribbon cable that attaches the screen to the motherboard. The same caution applies when installing a replacement back cover. (Source: ifixit.com)

Q: Does this include the battery?
A: Not specified — please confirm with us before ordering.

Package Include

• Repair parts are shown in the picture.

Product Inspection

• Display Screen Check
• Cable Connection Check
• Frame Waterproof Test
• Contact Oxidation Inspection