Message
Causes
Solutions
"XXX cannot be YYY
because the Digital
Signature's device certificate
is not currently valid."
(XXX and YYY indicate the
user action.)
The device certificate (PDF
with digital signature or
PDF/A with digital
signature) has expired.
A new device certificate (PDF with
digital signature or PDF/A with digital
signature) must be installed. For details
about how to install a device certificate
(PDF with digital signature or PDF/A
with digital signature), see Security
Guide.
"XXX cannot be YYY
because there is a problem
with the Digital Signature's
device certificate. Check the
device certificate."
(XXX and YYY indicate the
user action.)
There is no device certificate
(PDF with digital signature or
PDF/A with digital
signature), or the certificate
is invalid.
A new device certificate (PDF with
digital signature or PDF/A with digital
signature) must be installed. For details
about how to install a device certificate
(PDF with digital signature or PDF/A
with digital signature), see Security
Guide.
• If a fax or an e-mail cannot be sent and a message appears which states that there is a problem
with the device certificate or user certificate, a new certificate must be installed. For details about
how to install a new certificate, see Security Guide.
When Problems Occur While Logging In
Message
Causes
Solutions
"Authentication has failed."
The entered login user name
or login password is not
correct.
For details about the correct login user
name and login password, see
Security Guide.
"Authentication has failed."
The machine cannot perform
authentication.
For details about authentication, see
Security Guide.
10. Troubleshooting
212
Summary of Contents for MP C401
Page 2: ......
Page 8: ...INDEX 219 6 ...
Page 12: ...10 ...
Page 42: ...3 Press Edit Home 4 Press Add Icon 5 Press the Program tab 2 Getting Started 40 ...
Page 102: ...4 Pages per Sheet Right then Down Down then Right Left then Down Down then Left 5 Print 100 ...
Page 126: ...6 Scan 124 ...
Page 130: ...7 Document Server 128 ...
Page 156: ...9 Adding Paper and Toner 154 ...
Page 216: ...10 Troubleshooting 214 ...
Page 220: ...11 Information for This Machine 218 ...
Page 224: ...MEMO 222 ...
Page 225: ...MEMO 223 ...
Page 226: ...MEMO 224 EN GB EN US D193 7501 ...
Page 227: ... 2013 ...
Page 228: ...D193 7501 US EN GB EN ...