Dead Roland Boss Katana-100 Guitar Amplifier : The Internet Says These Are Impossible To Repair

This Boss Katana Guitar Amplifier suddenly died, it does not power on, no LEDs, no sound, nothing, nada. I've not looked at one of these before but googling around the net didn't find any schematics and although I found messages from others asking for help with the same fault on various audio repair forums there seems to be very little info out there about these amps, how they work and I couldn't find any repair guides. So let's see if I can get any further with these alegedly 'impossilble to repair' guitar amps... For All Your PCB needs: free $5 discount coupon https://www.pcbway.com/setinvite.aspx... AliExpress Coupons 👉Click the link https://s.click.aliexpress.com/e/_Evb... or enter the search code [AYFU3C] on the AliExpress homepage. And don't forget to enjoy extra savings with the exclusive discount codes below. 🌟 Remember, these codes can be used on almost all items in selected countries on AliExpress. These codes are for USA buyers only until 1st August. Discount Codes: $2 off on orders over $18:【LEABC2】 $5 off on orders over $39:【LEABC5】 $10 off on orders over $69:【LEABC10】 $20 off on orders over $139:【LEABC20】 $23 off on orders over $169:【LEABC23】 $35 off on orders over $249:【LEABC35】 $55 off on orders over $379:【LEABC55】 $70 off on orders over $499:【LEABC70】 These codes valid WORLDWIDE until 1st August 2026 $3 off on orders over $29:【IFPH3QCH】 $6 off on orders over $59:【IFPUITII】 $9 off on orders over $89:【IFPKTYZF】 $16 off on orders over $149:【IFPKSB1Y】 $23 off on orders over $199:【IFPGVQ2I】 $30 off on orders over $269:【IFPMJL29】 $40 off on orders over $369:【IFPPCLK9】 $50 off on orders over $469:【IFPUTWNY】 $60 off on orders over $599:【IFPAF4GV】 $70 off on orders over $699:【IFPXSMK2】Equipment used in my videos. These are affiliate links, you pay the normal price and I make a small commission. DM40C https://s.click.aliexpress.com/e/_c4q... Aneng AN870 (Same as Zoyi ZT219) https://s.click.aliexpress.com/e/_c2w... Zoyi ZT-DQ02 https://s.click.aliexpress.com/e/_oB2... WinAPEX 268B Clamp Meter https://s.click.aliexpress.com/e/_opJ... VC480C+ MILLIOHM METER https://s.click.aliexpress.com/e/_onE... MESR-100 ESR METER https://s.click.aliexpress.com/e/_oom... XC6013L CAPACITOR METER https://s.click.aliexpress.com/e/_omn... FNB58 USB ANALYZER https://s.click.aliexpress.com/e/_c3h... 4KV Breakdown Tester https://s.click.aliexpress.com/e/_omK... LED Backlight Tester https://s.click.aliexpress.com/e/_oCR... NI-210SC Curve Tracer https://s.click.aliexpress.com/e/_o2e... NI210SJ (cheaper option but watch my review) https://s.click.aliexpress.com/e/_oD6... PCI POST ANALYZER https://s.click.aliexpress.com/e/_c44... FNIRSI 1014D SCOPE https://s.click.aliexpress.com/e/_c2x... NPS3010W 30V 10A PSU https://s.click.aliexpress.com/e/_oDu... Nice-Power Dual 120V 3A PSU https://s.click.aliexpress.com/e/_okG... HR1520 Pro Short Killer https://s.click.aliexpress.com/e/_c2R... KSGER T12 Soldering Station https://s.click.aliexpress.com/e/_omq... AIFEN-A9 PRO Soldering Station C115/C210/C245/C470 https://s.click.aliexpress.com/e/_ong... C470 Soldering Iron & Tips https://s.click.aliexpress.com/e/_opm... https://s.click.aliexpress.com/e/_oDV... QUICK 861DW https://s.click.aliexpress.com/e/_ooW... PROS'KIT SS-331H https://s.click.aliexpress.com/e/_omx... Sequre HT140 Hot Tweezers https://s.click.aliexpress.com/e/_opH... KADA 853B Preheater https://s.click.aliexpress.com/e/_opP... FNIRSI SWM-10 Spot Welder https://s.click.aliexpress.com/e/_ooZ... INFIRAY P2 PRO IR CAMERA + MACRO LENS https://s.click.aliexpress.com/e/_oot... TOOLTOP ET13S THERMAL CAMERA METER https://s.click.aliexpress.com/e/_c4M... ET13S MACRO LENS https://s.click.aliexpress.com/e/_ol9... Trinocular Microscope https://s.click.aliexpress.com/e/_okJ... TOMLOV TM4K AF FLEX https://s.click.aliexpress.com/e/_oBi... TL866 II+ PROGRAMMER https://s.click.aliexpress.com/e/_c32... NC-559-ASM FLUX https://s.click.aliexpress.com/e/_onM... DESOLDER BRAID (I use size 8045) https://s.click.aliexpress.com/e/_onh... HX-T100 SOLDER https://s.click.aliexpress.com/e/_o2D... ESD-11 TWEEZERS https://s.click.aliexpress.com/e/_om2... Learn Electronics Repair Discord   / discord   If you would like to support this channel You can send donations https://www.paypal.com/paypalme/youtu... You can subscribe to Patreon   / learnelectronicsrepair   Or you can click JOIN to become a channel member Thank you Richard