User's Manual

Table Of Contents
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V400M PLUS 3G & V400M BASES INSTALLATION GUIDE 31
CHAPTER 4
Troubleshooting
Guidelines
This chapter lists typical malfunctions that may occur while operating a V400m
Plus 3G terminal or V400m Base and the appropriate corrective action. If the
problem persists – even after performing the outlined guidelines, or if the problem
is not described, contact your local Verifone representative for assistance.
Display Panel
Does Not Work
Use the following steps to check the display panel:
1 Check all the cable connections.
2 Check the device's AC outlet to be sure the outlet is supplying sufficient
power. Substitute the device's power pack with another power pack.
3 The device's application program might not be loaded correctly. Download the
application program and try again.
4 If the problem persists, contact your local Verifone representative.
Keypad Does
Not Respond
Use the following steps to check the keypad:
1 Check the display panel. If there are no characters, or the wrong characters
are displayed, refer to Display Panel Does Not Work.
2 If the problem persists, contact your local Verifone representative.
Transactions
Fail To Process
There are several possible reasons why the unit may not be processing
transactions. Use the following steps to troubleshoot failures.
Check Magnetic Card Reader
Perform a test transaction using one or more different magnetic stripe cards to
ensure the problem is not a defective card.
Ensure that you are swiping cards properly (see Magnetic Stripe Card
Reader).
Process a transaction manually using the keypad instead of the card reader. If
the manual transaction works, the problem may be a defective card reader.
NOTE
The V400m Plus 3G terminal and V400m Base use a tamper-evident case and
contains no user-serviceable parts. Do not, under any circumstance, attempt to
disassemble the unit. Perform only those adjustments or repairs specified in this
guide. For all other services, contact your local Verifone service provider. Service
conducted by parties other than authorized Verifone representatives may void any
warranty.