Sony MZ-E510 MiniDisc Player

Sony MZ-E510 MiniDisc PlayerSony MZ E510 MiniDisc player (blue). Used. Summary: Sold for parts only not working. Appearance is quite good but it's not possible to insert or eject discs properly to some crush damage to the lid. Product Condition (Appearance): There are four or five small marks on the front face, and a small amount of paint has worn away on the bottom left corner. There are some small marks and scratches on the rear face. There's a small black mark on the battery

Sony MZ-E510 MiniDisc player (blue). Used.

Summary:
Sold for parts only/not working. Appearance is quite good but it's not possible to insert or eject discs properly to some crush damage to the lid.

Product Condition (Appearance):
There are four or five small marks on the front face, and a small amount of paint has worn away on the bottom left corner.
There are some small marks and scratches on the rear face.
There's a small black mark on the battery cover.

Product Condition (Functionality):
The device can be powered using a gum battery and a dry cell battery in an external battery case. 
However, due to some deformation of the chassis it's not possible to insert or remove discs without using force, and even if inserted, the device does not read discs as expected.
See test results and photographs for detail.

Player / Recorder Unit:
Sony MZ-E510 (blue)

Power Via Rechargeable Gum Battery - OK
Power Via External Battery Case - OK
Power Via Charging Stand - Untested

Audio Playback - Not tested
Audio Output - Not tested

Group Button - When verified using an inline remote (RM-MC33EL) the button responds but unable to confirm functionality.
Volume Down - OK. Verified using  an inline remote (RM-MC33EL).
Volume Up - OK. Verified using  an inline remote (RM-MC33EL).
Play / Pause Button - When verified using an inline remote (RM-MC33EL) the button responds but unable to confirm functionality.
Next Track - When verified using an inline remote (RM-MC33EL) the button responds but unable to confirm functionality.
Previous Track - When verified using an inline remote (RM-MC33EL) the button responds but unable to confirm functionality.
Stop Button - When verified using an inline remote (RM-MC33EL) the button responds but unable to confirm functionality.
Hold - OK

Disk Insert - Not possible to insert a disc unless you force it into the device.
Disk Eject - Not possible to remove a disc unless you force it out of the device.
Close Lid - Only possible by sliding the Open switch to the 'open' position first, then releasing after closing the lid.

Product Information:
The Sony MZ-E510 is the penultimate iteration of the 5xx series of MiniDisc players (500,501,505,510,and 520). It is dedicated to disc playback, and does not have disc recording functionality. 
Released in 2003, it features support for MDLP, anti-shock 'G Protection', a six band equalizer, and ATRAC type S technology. 
It weighs 67 grams without a battery or disc installed. 
It has a 3.5 mm headphone jack for audio output.