How to downgrade your PSP Firmware with Chronoswitch - Darthsternie's Firmware Archive
Cant downgrade my psp2000 to 6.6 using chronoswitch : r/PSP
Downgrading 3004 from 6.61 PRO-C2∞ to 6.60, error LPTFFFFFFFE, still boots into 6.60, UMD not working · Issue #2 · DaveeFTW/Chronoswitch · GitHub
PSPHACKS 1.03] Downgrading Your Custom Firmware From 6.61 to 6.60 Using Chronoswitch 7.0 - YouTube
Downgrading PSP 2000 using Chronoswitch v7 from 6.61 to 6.60 - error CAAFFFFFCF7 · Issue #1 · DaveeFTW/Chronoswitch · GitHub
How to downgrade your PSP Firmware with Chronoswitch - Darthsternie's Firmware Archive
PSP: Downgrader for Firmware 6.61 - YouTube
How To Downgrade PSP 6.61 To 6.60! (Chronoswitch Downgrader) 2017! - YouTube
PSP: Downgrader for Firmware 6.61 - YouTube
Got this baby. System version is 6.39. Never been hacked. What should I do to hack it? 6.60 or 6.61? Confirmation button is O. Can I switch it to X with Infinity
PSP: First hacks for the new Firmware 6.61 - PRO CFW & Downgrader updated! - Wololo.net
How To Downgrade PSP 6.61 To 6.60! (Chronoswitch Downgrader) 2017! - YouTube